Tag: spaceflight

Inexplicable high latitude Martian terrain

2:58 pm

Inexplicable high southern latitude Martian terrain

Strange image time! The image on the right, reduced in resolution to post here, comes from the August 1, 2018 image release from the high resolution camera on Mars Reconnaissance Orbiter (MRO). (If you click on the image you can see the full resolution version.) I have not cropped this image at all, so that you can see all of its swirling terrain.

This image did not come with a caption. The image site merely describes this terrain as having an “interesting morphology.” The location, in the very high southern latitudes (78 degrees south) just outside the southern rim of a very large crater, provides a slight explanation, as the growth and retreat of the Martian carbon dioxide polar caps is known to create very strange landforms. These swirling flows are obviously an example of one such landform.

The crater rim is just off of the top of the image and parallel with it. Therefore, the apparent erosional flows going around the hills and mesas are running parallel to the rim, not down from it. The black specks scattered about are probably points where dust was released as the carbon dioxide turned from ice to gas, a process that at the high latitudes on Mars often causes what planetary scientists call “spiders.”

I will not even try to make a guess at the process that formed what we see here. The image itself was taken on June 16, 2018 as part of a seasonal monitoring effort, which means scientists expect there to be changes occurring here from year to year as the polar cap shrinks and grown. An almost identical image had been taken two years ago, on December 18, 2016, and shows almost no black specks, probably because of the different time in the Martian year. A much closer comparison of both high resolution images would be necessary to tease out any more subtle changes.

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EXOS completes successful test flight of reusable suborbital rocket

9:30 am

Capitalism in space: EXOS Aerospace yesterday completed a successful test flight of its reusable suborbital rocket, SARGE, at Spaceport America in New Mexico.

The company’s first Suborbital Autonomous Rocket with GuidancE, or SARGE, rocket lifted off from Spaceport America in New Mexico at approximately 2:15 p.m. Eastern. After reaching an unspecified peak altitude, the rocket descended under parachute, landing about 15 minutes later a short distance from the pad. The rocket’s nose cone, descending under a ballute, landed several minutes earlier.

The company didn’t immediately disclose technical details about the flight, such as the peak altitude, but in a live webcast of the launch appeared to be satisfied with the vehicle’s performance, despite the vehicle appearing to veer from its vertical trajectory briefly after liftoff.

“This was a very successful test for us,” said John Quinn, chief operating officer of Exos, on the webcast. “We’re very excited that we had all of our recovery systems operational.”

It sounds as if they were mostly testing the recovery systems that will allow the rocket and payload to land safely in a condition to fly again.

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Volcanic rills and lava tubes on Mars

9:34 am

Rills and lava tubes on Pavonis Mons

Cool image time! The image on the right, cropped somewhat to show here, was taken by Mars Odyssey of the southwestern slope of Pavonis Mons, the middle volcano of the line of three giant volcanoes located between the biggest volcano in the solar system, Olympus Mons, and the biggest canyon in the solar system, Marineris Valles. The slope goes down to the south, from the top to the bottom of the image. As noted on the image page,

The channel and nearby oval depressions are both related to the flow of lava. Narrow lava flows can create channels. The cooling of the top of the channel will form a roof over the flow, creating a tube beneath the surface. After the lava stops flowing the tube can empty, leaving a subsurface void. The roof will then collapse into the void forming the oval surface features.

I have added arrows to the image to draw your eye to the features that extend south in line with those oval depressions, eventually widening out to resemble a river delta, with the obvious rill probably indicating the lowest point in that delta.

Though the oval depressions are likely sections of a lava tube that collapsed, the features in line with those depressions suggest that the tube itself might still exist below the surface to the south, feeding into that delta where the rill meanders. It is also possible that my desire to find underground voids here, where glacier ice might possibly exist, might be skewing my conclusion. It could also be that the lava tube ended at these depressions, and what the features indicate is a wide surface flow, later embellished by the smaller flow of the meandering rill.

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Hayabusa-2 science team lay out Ryugu landing schedule

8:41 am

At a press conference yesterday the Hayabusa-2 science team laid out their landing schedule for the spacecraft and its three tiny landers.

The first lander will be one of its two tiny MINERVA-II probes, and will take place in September. This will be followed by the German/French MASCOT probe in early October, followed in turn in late October by Hayabusa-2 itself.

The landings of the first two probes will help them pick Hayabusa-2’s landing site, as well as the site for last MINERVA lander.

Mission planners faced tough choices because the body almost uniformly strewn with boulders. “Ryugu is beautiful, but challenging,” said Aurélie Moussi, a collaborator from the French space agency CNES in Toulouse, at a press conference in Sagamihara, Japan, on 23 August.

…To minimize risks for MASCOT, mission planners mapped the topography of Ryugu and the distribution and size of the boulders on its surface. They ran computer simulations to produce a shortlist of ten options, and then picked one spot on the asteroid’s southern hemisphere. The choice reflected a number of criteria, including average temperatures on the ground and the materials that MASCOT will analyse with its four on-board instruments. “The other sites would have been just as good, or just as difficult,” says MASCOT payload manager Stephan Ulamec of the German Aerospace Center in Cologne. “Wherever we look, there is a lot of big boulders.”

It does appear that the boulder-strewn surface is posing a problem for the engineers.

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Trump administration goes all in for LOP-G

11:23 am

The swamp wins! In a speech today Vice President Mike Pence made it clear that the Trump administration is giving its full endorsement to the construction of the Lunar Orbiting Platform-Gateway (LOP-G), as well as SLS and Orion. These big boondoggles, which will trap us in lunar orbit while the Chinese set up lunar bases and take possession of the surface and its resources, are going forward, with both the president’s support as well as Congress’s.

Providing further evidence that the Trump administration has bought into these projects, in his introduction of Pence NASA administrator Jim Bridenstine gave a big public endorsement to the executive secretary of the National Space Council, Scott Pace, a man who has been a big supporter of these projects of the bureaucracy. Pace believes we need these projects, despite the fact that they have been under construction for two decades, have cost an ungodly amount, and have literally flown nowhere.

Pence also said that they intend to have the space force a reality by 2020, and also hinted that the Trump administration is making a careful review on the future of ISS.

Overall, the speech was a big endorsement for government space, in every way, with the private sector designed not to lead as free Americans following their personal dreams but to follow, servants of the desires of the government and its wishes.

If you want to listen to about 30 minutes of pro-government promotion, I expect it will be posted here at some point.

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Swooping over a lunar cold spot

10:20 am

cold spot crater

Cool image time! The oblique image on the right, reduced and cropped to show here, was taken by Lunar Reconnaissance Orbiter (LRO) of an unnamed crater on the Moon’s far side. (Click on the image to see the full picture.) What makes the crater of particular interest is that it during the long 14-day-long lunar night the area around this young crater quickly cools to a temperature about 10 degrees Fahrenheit colder than the surrounding terrain.

Einthoven cold spot crater, the subject of today’s Featured Image, is 1143 m wide, or about the size of Meteor Crater in Arizona. So far, it has no official name — we call it Einthoven cold spot crater because it is just south of Einthoven crater, which is old, degraded, and, at 69 kilometers in diameter, the largest crater in the neighborhood.

Though craters associated with cold spot anomalies are small, the cold spots themselves are often large. The Einthoven cold spot crater anomaly takes in 2070 square kilometers of terrain and extends up to 50 kilometers from the crater. That’s much too large an area for ejecta from the crater to cover, which eliminates the most obvious cold spot formation hypothesis: that material blasted from the crater during its formation could create the cold spot.

So, how to explain the cold spot anomalies? Some researchers invoke a cascading series of tiny secondary impacts traveling outward from the crater-forming asteroid impact, while others believe that gas produced by the impact flows through the top layer of lunar surface material. Either process might “fluff up” the surface, changing the way heat affects it. Few researchers, however, find these explanations to be 100% convincing.

Though the abstract of one science paper proposes using these cold spots as an easy way to quickly identify young lunar craters, the actual cold area of this particular crater does not correspond perfectly to the crater itself. The temperature map at the link shows that the colder region is not even centered on the crater, and has a very irregular shape. Using these mysteriously cold regions on the Moon to identify young impacts I think will be difficult and will have a very large margin of error.

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NASA considering purchase of communications services

9:33 am

Capitalism in space: Rather than build its own communications satellites, as it has done in the past, NASA is now considering purchasing these services from private communications satellite companies.

NASA had been studying a next-generation communications system that would ultimately replace the current generation of Tracking and Data Relay Satellite (TDRS) spacecraft in Earth orbit, as well as support missions beyond Earth orbit. That included the possibility of partnerships with the private sector.

“Past networks have been expensive to operate and maintain because they were designed to only serve government customers, which has limited their ability to leverage commercial partnerships,” the agency said in its fiscal year 2019 budget proposal released in February. “The next generation project will engage with commercial industry through mechanisms such as services contracts, hosted payloads, and other public-private-partnerships to allow multiple commercial entities to partner with the Government in order to significantly reduce and eventually eliminate reliance on NASA or NASA contractor run ground systems.”

In a paper presented last year by several NASA officials at the International Astronautical Congress in Adelaide, Australia, the agency said working with both commercial and international partners would be among the elements of its next-generation architecture. “Using open, commercial, and international standards will enable the use of commercial services by specifying required performance and interfaces without specifying provider-specific capabilities,” the paper stated. “Commercial entities will compete based on price, quality, timeliness, support and other factors that maintain a competitive environment.”

That desire to work with the commercial sector, along with harnessing new technologies like optical communications, was a reason cited by NASA a year ago for not exercising an option for an additional TDRS satellite under a contract NASA awarded to Boeing in 2007. The last satellite built under that contract, TDRS-M, launched in August 2017.

Using commercial communications satellites makes perfect sense. It will be faster, provide more redundancy, and will save the taxpayer a lot of money.

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Arianespace’s Vega launches European satellite to study the Earth’s winds

9:18 am

Arianespace’s Vega rocket has successfully launched a European satellite dubbed Aeolus designed to study the Earth’s winds.

Funded by the European Space Agency and built by Airbus Defense and Space, the 480 million euro ($550 million) Aeolus mission is nearly two decades in the making. Since receiving ESA’s formal go-ahead in 2002, Aeolus has suffered numerous delays as engineers encountered problems with the mission’s laser instrument.

Aeolus will gather the first comprehensive worldwide measurements of wind speed — over oceans and land masses — from Earth’s surface to an altitude of nearly 100,000 feet (30 kilometers).

Data collected by the Aeolus satellite will be fed into numerical weather prediction models, replacing simulated “boundary conditions” in the computers models with near real-time measurements from space.

The updated leader board for the 2018 launch standings:

22 China
15 SpaceX
8 Russia
6 ULA
5 Arianespace

In the national race, the U.S. and China remained tied at 22.

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Oblique mosiac of bright spot on Ceres

9:40 am

Cerealia Facula on Ceres

Cool image time! With the Dawn spacecraft now swooping with 22 miles of the surface of Ceres every 27 hours, the science team has assembled a spectacular oblique image of Cerealia Facula, one of the dwarf planet’s bright spots thought to be brine deposits that at some point erupted up from below the surface.

The image on the right, reduced in resolution to show here, shows that mosaic. If you click on the image you can see the full resolution version. From the image webpage:

This mosaic of Cerealia Facula combines images obtained from altitudes as low as 22 miles (35 km) above Ceres’ surface. The mosaic is overlain on a topography model based on images obtained during Dawn’s low altitude mapping orbit (240 miles or 385 km altitude). No vertical exaggeration was applied.

There are a lot of intriguing details in the full resolution image. I have highlighted one feature, indicated by the white box and shown in full resolution below.
» Read more

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EXOS to test fly reusable suborbital rocket in New Mexico

8:54 am

Capitalism in space: EXOS Aerospace has chosen Spaceport America in New Mexico as the location where it will test fly its reusable suborbital rocket dubbed SARGE.

EXOS has completed the design, test and build; has received its FAA launch license and completed the final integration and test hovering for the rocket. A successful test flight is needed to solidify the company’s plans to use the technology as the basis for a planned reusable Orbital class vehicle, the company said in a pres release issued Tuesday.

“We are excited to enter into the testing phase of our SARGE platform at Spaceport America, and even more excited to reveal our plans for our Jaguar Reusable (first stage) LEO launcher,” EXOS COO John Quinn said in a prepared statement. “We look forward to enabling space research, manufacturing and educational opportunity for the world by providing frequent suborbital flights that provide fast and affordable access to space.”

Spaceport American CEO Dan Hicks said a successful test flight could lead to further testing and development at the spaceport.

EXOS is another one of the host of new smallsat rocket companies vying for expected large launch needs in the 2020s. For Spaceport America, a state-run spaceport that was built for Virgin Galactic and its hyped surge in space tourism that never happened and thus has seen practically no activity for the past decade, this announcement is helpful in its effort to attract other launch business.

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Air Force to accelerate hypersonic weapon development?

10:12 am

By signing two different contracts worth $1.4 billion in the past four months with Lockheed Martin, the Air Force is claiming that it is accelerating the development of hypersonic weapons in order to keep up with similar development by the Chinese and the Russians.

The first contract, announced in April, awards $928 million to develop something called the Hypersonic Conventional Strike Weapon (HCSW). And last week, the Air Force disclosed another deal, worth up to $480 million, to begin designing the Air-Launched Rapid Response Weapon (ARRW).

“We are going to go fast and leverage the best technology available to get hypersonic capability to the war fighter as soon as possible,” Secretary of the Air Force Heather Wilson said in a statement last week.

Hypersonic vehicles travel at least five times faster than the speed of sound (Mach 5; Mach 1 at sea level is 762 mph, or 1,226 km/h). And they’re designed to be maneuverable, which differentiates them from intercontinental ballistic missiles (ICBMs) and other fast-flying conventional weapons systems that follow predictable paths. “We don’t currently have effective defenses against hypersonic weapons because of the way they fly; i.e., they’re maneuverable and fly at an altitude our current defense systems are not designed to operate at,” Richard Speier, adjunct staff at the nonprofit RAND Corp., told CNBC in March. “Our whole defensive system is based on the assumption that you’re gonna intercept a ballistic object.”

I am a bit skeptical here. The military has been playing around with hypersonic development now for the last fifteen years, spending a lot of money flying a handful of test flights of three different design concept prototypes. Nothing is even close to an actual operational vehicle. These new contracts might produce something, but I fear that they are also pork-laden, and will be too expensive and take far too long, producing nothing more than test prototypes once again.

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Flying Boeing’s Starliner capsule

9:54 am

Link here. The article provides some nice details about the way the spacecraft will operate (mostly by computer), with the astronauts monitoring and capable of taking over at any point.

Unlike Dragon, the control panel has no touchscreens. According to astronaut Chris Ferguson, the design was “borrowed a little bit from Orion, and it’s kind of the way some of the 5th generation military planes interact with pilots.” Not as fancy, but maybe more practical. I still have my doubts about the ability of astronauts to accurately press a touchscreen during the vibrations of launch.

There is something else, however, about this article that bugs me. It reads too much like an SLS update, filled with glowing reports that, in the case of SLS, are designed to disguise a program that is not going to meet its schedule. This is pure speculation based on nothing but instinct, but it is an impression I have and do not like.

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Stratolaunch to build its own upper stages

9:40 am

Capitalism in space: Stratolaunch today announced that it is designing and building three differently-sized upper stage rockets to attach to the fuselage of its giant Roc airplane.

Beside the Pegasus rocket, owned by Northrop Grumman, aimed for first flight in 2020, Stratolaunch will build a medium and medium-heavy rockets, with the former set for a 2022 flight, as well as a fully reusable space plane, now in early development.

The space plane concept would apparently be capable of taking payloads up and down from orbit, and could therefore become the first totally reusable launch capability.

Overall, it does appear that the company, unable to find someone else to design its upper stage, has been forced to do it itself.

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Parker makes first course adjustment

9:29 am

The Parker Solar Probe successfully made its first mid-course correction burn yesterday.

Spacecraft controllers at the mission operation center initiated the two-part TCM-1 [trajectory correction maneuver] beginning at 6:00 a.m. EDT on Aug. 19 with a 44-second burn of the engines. The majority of the engine firing, which lasted just over seven minutes, began at 6:00 a.m. EDT on Aug. 20.

The spacecraft is now traveling at almost forty thousand miles per hour, easily enough to escape the solar system. Its course however is such that it will instead zip past the Sun, at closer distances after each orbit and Venus flyby.

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New analysis strengthens evidence of water in lunar polar craters

11:37 pm

ice signatures in lunar south pole craters

The uncertainty of science: Scientists using data from India’s Chandrayaan-1lunar orbiter today claimed that they have confirmed water in the Moon’s polar craters.

A team of scientists, led by Shuai Li of the University of Hawaii and Brown University and including Richard Elphic from NASA’s Ames Research Center in California’s Silicon Valley, used data from NASA’s Moon Mineralogy Mapper (M3) instrument to identify three specific signatures that definitively prove there is water ice at the surface of the Moon.

M3, aboard the Chandrayaan-1 spacecraft, launched in 2008 by the Indian Space Research Organization, was uniquely equipped to confirm the presence of solid ice on the Moon. It collected data that not only picked up the reflective properties we’d expect from ice, but was able to directly measure the distinctive way its molecules absorb infrared light, so it can differentiate between liquid water or vapor and solid ice.

Most of the newfound water ice lies in the shadows of craters near the poles, where the warmest temperatures never reach above minus 250 degrees Fahrenheit. Because of the very small tilt of the Moon’s rotation axis, sunlight never reaches these regions.

The image on the right shows the craters surrounding the south pole with water ice signatures, according to this new analysis.

This press release has some puzzling aspects. First, it is almost a decade since this data was gathered. Why is this suddenly reported now, just prior to the launch of Chandrayaan-2? I suspect this release has come out now to garner some PR for that new mission.

Also, there is nothing in this release that explains why these results should be considered more certain than previous results. In fact, previous data from different lunar orbits has been somewhat contradictory, suggesting a lot of uncertainty about the presence of water-ice at the lunar poles that this story does not address or alleviate in any way.

Nonetheless, this new analysis and data adds more weight to the possibility of water near the lunar poles, making that real estate a prime target for future bases. Too bad it is China that is aiming to grab this territory, while NASA wants us to circle the Moon in LOP-G, going nowhere.

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NASA officially approves SpaceX’s fueling system

9:08 pm

Surprise, surprise! NASA on August 17 officially approved SpaceX’s fueling system where the astronauts would enter the Dragon capsule before the Falcon 9 rocket would fueled.

In a statement published late Aug. 17, the agency said that it was allowing SpaceX to move ahead with plans to use what’s colloquially known as “load-and-go,” where the Falcon 9 launch vehicle is filled with liquid oxygen and kerosene propellants after astronauts board the Crew Dragon spacecraft on top of the rocket.

“To make this decision, our teams conducted an extensive review of the SpaceX ground operations, launch vehicle design, escape systems and operational history,” Kathy Lueders, NASA’s commercial crew program manager, said in the statement. “Safety for our personnel was the driver for this analysis, and the team’s assessment was that this plan presents the least risk.”

Blah, blah, blah. They had made it clear they were going to approve SpaceX’s fueling approach last week. NASA safety bureaucrats have been whining about SpaceX’s fueling approach for more than a year and a half, for no logical reason, and for what I surmised were purely political reasons having zero to do with safety. At times I have stated that when SpaceX was getting close to actually flying, NASA would back down. And I also expected SpaceX to push its launch dates to force NASA to back down, in contrast to the old-time big space contractors who routinely would kowtow to NASA in these matters and allow its bureaucracy to push them around.

These events are more evidence that the April 2019 manned Dragon launch is on schedule.

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SpaceX unveils access arm jetway astronauts will use to board Dragon

2:04 pm

Capitalism in space: SpaceX has begun installing its airport-jetway-like access arm that astronauts will use to board Dragon at Launchpad 39A in anticipation of the first manned flight in April 2019.

They were originally going to install the jetway after the first unmanned demo flight, which they hoped to fly this month. That plan has now changed.

Prior to the visual milestone this week of the Crew Access Arm, or CAA, being moved to the pad surface and the base of the Fixed Service Structure (launch tower), previous information from SpaceX and NASA indicated that the arm would be installed after the Dragon’s uncrewed demo flight.

However, that schedule was based around a launch of the uncrewed Dragon flight, DM-1, in August 2018.

With NASA announcing a 3-month slip to the DM-1 flight (largely due to ISS scheduling and crew reduction aboard the International Space Station in the coming months), SpaceX found itself with an unanticipated delay to the DM-1 flight – which in turn opened up a possibility that didn’t exist before to install the CAA in August.

…But now that DM-1 is NET (No Earlier Than) November – a date Gwynne Shotwell is confident the company will meet, SpaceX is forging ahead with CAA installation because, quite simply, there is no reason to wait, at this point, to install the arm after DM-1.

Making the crew access arm resemble an airport jetway is a fine example of the pizazz that helps sell SpaceX. It also helps make space operations appear more like an ordinary transportation option, something that is necessary if the human race is ever going to become truly spacefaring.

Hat tip to reader Kirk.

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3D-printed solar panels for cubesats!

11:24 am

A solar panel for a cubesat

The image on the right was sent to me last night by engineer Joe Latrell. It shows a 3D-printed solar panel designed for use on a cubesat. As he wrote,

[This is] the first integration of a solar panel with the 3D printed material. The panel is not attached but rather embedded in the plastic during the printing process. This helps protect the panel from transport damage and makes it easier to assemble the final satellite. This design needs a slight adjustment but is almost there.

What makes Joe’s work most interesting is where he is doing it. Last week, in posting a link to a story about a Rocket Lab deal that would make secondary payloads possible on its smallsat rocket Electron, I noted that things were moving to a point where someone could build a satellite for launch in his garage.

This in turn elicited this comment from Joe:

As a matter of fact, I am building a PocketQube satellite for launch in Q3 2019. Yes, I am working in a small shop – just behind the garage. Nothing fancy but the price was right. I am working with Alba Orbital and the flight is scheduled on the Electron. These are very exciting times.

Alba Orbital is smallsat company aimed at building lots of mass produced smallsats weighing only about two pounds.

Anyway, Joe then followed up with another comment with more information:

This first [satellite] is just to see if it can be done. I plan to have it take a couple images and relay data regarding the orientation methods I am planning to use (gravity and magnetic fields). If it works, I am hoping to get funding to develop a small series of satellites to track global water use.

It is also a good way to test some of the materials I think would make spacecraft lighter and cheaper.

Yesterday he sent me the above image. This is the future of unmanned satellites and planetary probes, small, light, cheap, and built with 3D printers by single entrepreneurs. And because of their inexpensive nature, the possibilities for profit and growth are truly almost infinite, which in turn will provide developments that make space travel for humans increasingly smaller, lighter, cheaper, and easier to build as well.

To repeat Joe’s comment, these are very exciting times.

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Roscosmos in the news!

9:48 am

Three news stories from Russia, two from today and one from last week, provide us a flavor of the kind of space stories that come out of Russia almost daily, either making big promises of future great achievements, or making blustery excuses for the failure of those big promises to come true.

In the first the head of Roscosmos, Dmitry Rogozin, rationalizes the failure of Russia to compete successfully with SpaceX.
» Read more

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Opportunity’s uncertain future

11:24 pm

Link here. This article from JPL provides a detailed status report on the rover, as well as what will happen if they should regain communications.

After the first time engineers hear from Opportunity, there could be a lag of several weeks before a second time. It’s like a patient coming out of a coma: It takes time to fully recover. It may take several communication sessions before engineers have enough information to take action.

The first thing to do is learn more about the state of the rover. Opportunity’s team will ask for a history of the rover’s battery and solar cells and take its temperature. If the clock lost track of time, it will be reset. The rover would take pictures of itself to see whether dust might be caked on sensitive parts, and test actuators to see if dust slipped inside, affecting its joints.

Once they’ve gathered all this data, the team would take a poll about whether they’re ready to attempt a full recovery.

Even if engineers hear back from Opportunity, there’s a real possibility the rover won’t be the same. The rover’s batteries could have discharged so much power — and stayed inactive so long — that their capacity is reduced. If those batteries can’t hold as much charge, it could affect the rover’s continued operations. It could also mean that energy-draining behavior, like running its heaters during winter, could cause the batteries to brown out.

They remain hopeful, but this article is clearly meant to prepare the public for the possibility that Opportunity’s long journey on Mars might have finally ended.

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Ancient drainage on Mars?

9:49 am

Drainage on Mars?

Cool image time! The image on the right, cropped from the original to post here, was taken by Mars Odyssey on May 13, 2018, and shows what clearly looks like a point where a south-to-north drainage broke through a cliff wall to allow a liquid to flow down into the larger and deeper east-west flowing canyon.

The caption at the website for this image provides only a little analysis.

The right angle intersection of the depressions in this VIS image is one of the graben that form Sacra Fossae. The fossae are located on Sacra Mensa, near the beginning of Kasei Valles. Graben are depressions caused by parallel faults where a block of material drops down along the fault face.

According to this geological interpretation, the depressions initially formed due to this geological process. The image however suggests that a flow of liquid also played a part.

Overview map

This region, indicated by the white cross on the map to the right, is part of the vast drainages that flow down from Mars’ four giant Martian volcanoes. It is located north of Valles Marineris, the largest of all these drainages. This region is also where you find a lot of chaos terrain, which is what the hummocky depression at the bottom of the image resembles. Much of this mysterious geology is thought to have been formed by the liquid water that is theorized to have once flowed down from the volcanoes. Here, it appears that the liquid ponded in the depression at the bottom of the image until it found a path along the north-south graben to break through into the east-west deeper graben.

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State Department claims orbiting Russian satellite is a military threat

9:19 am

At a conference yesterday a State Department official claimed that an orbiting Russian satellite is behavior in a manner that suggests an unstated military purpose.

Russia has described the satellite in question as a “space apparatus inspector,” Yleem Poblete, assistant secretary for arms control, verification and compliance at the U.S. State Department, said at a conference on disarmament in Geneva yesterday. “But its behavior on orbit was inconsistent with anything seen before from on-orbit inspection or space situational-awareness capabilities, including other Russian inspection-satellite activities. We are concerned with what appears to be very abnormal behavior by a declared ‘space apparatus inspector,”’ Poblete said.

“We don’t know for certain what it is, and there is no way to verify it,” she added. “But Russian intentions with respect to this satellite are unclear and are obviously a very troubling development — particularly when considered in concert with statements by Russia’s Space Force commander, who highlighted that ‘assimilate[ing] new prototypes of weapons [into] Space Forces’ military units’ is a ‘main task facing the Aerospace Forces space troops.'”

If you read the whole speech, you will discover that much of this is somewhat overstated, and that it is simply part of the Trump administration’s aggressive lobbying in favor of creating a Space Force. I don’t deny that this satellite could be testing technologies that could have military uses. I can also recognize it when a government official is trying to use the press to advocate for more funding. At no point does Poblete describe in detail the behavior that makes them think this satellite is doing things “inconsistent with anything seen before from on-orbit inspection or space situational-awareness capabilities.” In fact, if it is making unusual orbital changes that is very consistent with these purposes since any satellite designed to make orbital inspections of other facilities would need that capability.

In fact, I bet it isn’t the satellite’s activity that concerns them, but its vague description. The Russians really haven’t told us what it is. While this is surely a concern, this speech’s purpose is to lobby for the Space Force, not pressure the Russians to provide more information.

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China unveils next lunar rover

8:54 am

The new colonial movement: In unveiling its next lunar rover, China today also announced they will hold a contest to name it.

Images displayed at Wednesday’s press conference showed the rover was a rectangular box with two foldable solar panels and six wheels. It is 1.5 meters long, 1 meter wide and 1.1 meters high.

Wu Weiren, the chief designer of China’s lunar probe program, said the Chang’e-4 rover largely kept the shape and conditions of its predecessor, Yutu (Jade Rabbit), China’s first lunar rover for the Chang’e-3 lunar probe in 2013. However, it also has adaptable parts and an adjustable payload configuration to deal with the complex terrain on the far side of the moon, the demand of relay communication, and the actual needs of the scientific objectives, according to space scientists.

Like Yutu, the rover will be equipped with four scientific payloads, including a panoramic camera, infrared imaging spectrometer and radar measurement devices, to obtain images of moon’s surface and detect lunar soil and structure.

The Chang’e-4 lunar probe will land on the Aitken Basin of the lunar south pole region on the far side of the moon, which is a hot spot for scientific and space exploration. Direct communication with the far side of the moon, however, is not possible, which is one of the many challenges for the Chang’e-4 lunar probe mission. China launched a relay satellite, named Queqiao, in May, to set up a communication link between the Earth and Chang’e-4 lunar probe.

I am not sure what they mean by “adaptable parts and an adjustable payload configuration.” That sounds like they upgraded this rover’s design to allow them to use it to build many similar rovers for use elsewhere, not just on the Moon. This sounds good, but the conditions on other planets are so different I’m not sure a direct transfer of the rover will work very well.

Chang’e-4’s launch is presently scheduled for December.

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Russian astronauts complete 8 hour spacewalk

8:36 am

Link here. Besides doing some basic maintenance work as well as literally tossing four cubesats into independent orbit, the most intriguing work was the installation of a German/Russian antenna designed to track animals.

Icarus is a collaborative environmental experiment between the German Aerospace Center (DLR) and Roscosmos to study the migratory patterns of small animals on Earth. It consists of an antenna and GPS hardware to track the movements of animals that have been tagged with small GPS receivers.

The experiment may provide data about how animals move from one location to another, how animal population density shifts over time, and how diseases spread.

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Cryptic terrain in Martian high southern latitudes

12:09 pm

Cryptic terrain in Reynolds Crater near Mars south pole

Cool image time! The image on the right is a small cropped section from a larger image taken of the floor of Reynolds Crater, near the margins of the Martian southern polar carbon dioxide icecap.

The image was part of the August 1, 2018 image release from the high resolution camera on Mars Reconnaissance Orbiter (MRO) and was taken on July 5, 2018. Because that was during the peak of now clearing global dust storm, a large majority of MRO’s images were obscured. Only images taken at high latitudes appeared clear and sharp.

The image link, which has no caption, calls this “cryptic terrain.” Since this is at the margin of the polar cap, the white areas are almost certainly still-frozen dry ice. The white strip down the center of the image appears to be a low drainage gully, made even more evident on the full image.

What are the dark spots however? These are probably related to the dark spiders that appear wherever the carbon dioxide starts to melt and evaporate into gas, releasing the darker dust from below to coat the surface. The dark spots in this image are probably that same darker dust, but why it is scattered about as spots and splotches is a mystery. It does appear that the dark areas more completely cover the higher terrain, but why and if so is definitely unclear.

Back in 1999 I attended a press conference just prior to the failure of Mars Polar Lander. One of the mission’s investigators explained that, based on the orbiter images available at the time, they expected the lander to see some very weird land forms once it reached the surface, shaped in ways that are not seen on Earth. Unfortunately, contact with the spacecraft was lost just before it entered the Martian atmosphere, and was never recovered.

This image however remains me of that scientist’s lost expectation. The seasonal growth and retreat of the Martian icecaps will likely create some strange geology, which is only hinted at in this particular MRO image.

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Ceres’ internal structure

10:21 am

The Dawn science team has released their first artist’s concept of the interior of Ceres, based on data gathered by the spacecraft.

Using information about Ceres’ gravity and topography, scientists found that Ceres is “differentiated,” which means that it has compositionally distinct layers at different depths. The most internal layer, the “mantle” is dominated by hydrated rocks, like clays. The external layer, the 24.85-mile (40-kilometer) thick crust, is a mixture of ice, salts, and hydrated minerals. Between the two is a layer that may contain a little bit of liquid rich in salts, called brine. It extends down at least 62 miles (100 kilometers). The Dawn observations cannot “see” below about 62 miles (100 kilometers) in depth. Hence, it is not possible to tell if Ceres’ deep interior contains more liquid or a core of dense material rich in metal.

The most intriguing part of this concept is the existence of a brine layer below the crust. I suspect it is this layer that they believe is the source of the white salty brine that produces Ceres’ ice volcanoes and bright spots.

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An update on China’s private smallsat rocket companies

10:09 am

Link here. The article describes the most recent news from OneSpace (which recently secured $44 million in financing), Landspace (building larger rockets), and Exspace (next launch planned for September).

While these companies are structured like American private companies, in China nothing having anything to do with space is really private. None of these companies can do anything without the full approval of China’s authoritarian communist government. Unlike Russia, however, China, has decided to allow competition to drive its space industry, not central control. It is encouraging small independent operations to come up with their own ideas and to compete with each other.

In the end, they will all be co-opted by the government, but for now this policy is producing for China some real results.

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SpaceX unveils interior of manned Dragon

10:02 am

Capitalism in space: Earlier this week SpaceX unveiled the interior of its Dragon capsule, along with the suits and other details, to reporters in California.

The article at the link has some good videos showing the capsule interior as well as its touchscreen control panel. It also includes quotes from SpaceX’s president Gwynne Shotwell repeating their intention to launch the manned mission by April 2019.

“Whenever we talk about dates we’re always confident and then something crops up,” Shotwell said. “Predicting launch dates can make a liar out of the best of us. I hope I am not proven to be a liar on this one. We are targeting November for Demo 1 and April for Demo 2.”

“I would love to say that this mission is going to be like every other mission, because I want every rocket and every capsule to be reliable, but I can tell you there will be about 7000 extra sets of eyes on the build of this system, the testing of this system and all the interfaces,” Shotwell added.

I would not be surprised if there was a few months slip in that schedule. I will be surprised if it slips more than that.

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