Tag: engineering

Parker survives first close solar fly-by

4:05 pm

The Parker Solar Probe has successfully survived its first close fly-by of the Sun.

Mission controllers at the Johns Hopkins University Applied Physics Lab received the status beacon from the spacecraft at 4:46 p.m. EST on Nov. 7, 2018. The beacon indicates status “A” — the best of all four possible status signals, meaning that Parker Solar Probe is operating well with all instruments running and collecting science data and, if there were any minor issues, they were resolved autonomously by the spacecraft.

At its closest approach on Nov. 5, called perihelion, Parker Solar Probe reached a top speed of 213,200 miles per hour, setting a new record for spacecraft speed. Along with new records for the closest approach to the Sun, Parker Solar Probe will repeatedly break its own speed record as its orbit draws closer to the star and the spacecraft travels faster and faster at perihelion.

It will be several weeks before they can download all the data gathered during this first fly-by.

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Puzzling fractures on Mars

11:31 am

Fractures on Mars

Cool image time! Today the Mars Reconnaissance Orbiter (MRO) science team released another month’s worth of images from the spacecraft’s high resolution camera. The picture on the right, reduced in resolution to post here, was the first image that I took a close look at, and decided it was worth posting immediately. If you click on the image you can see the full resolution version.

This image lacks a caption, but the release webpage is titled “Fractured Crater Floor.” It shows several cross-crossing fissures, some wide enough for dust to gather within into sand dunes. The fractures themselves appear to be cutting across a bulging dome.

My first reaction was to wonder where the heck this crater was on Mars, how big was it, and how dominate were the fractures within its floor. The image itself does not answer any of these questions. The fractures could be filling the floor, or not, and the crater could be small or big. Moreover, its location might help explain the cause of the fractures.

To understand any of the images from MRO it is always important to zoom out to get some context.
» Read more

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Russian company S7 says it will launch in three years

8:49 am

The Russian airline company S7 that now owns Sea Launch said today that it will launch a new rocket in three years.

The first rocket the company S7 Space is working on at the moment may take place in three years from now, the company’s chief, Sergey Sopov, told TASS in an interview, adding that the launch would be used for flight-testing a cargo spacecraft.

S7 Space is working on its own rocket on the basis of a sketch design of the Soyuz-5 launch vehicle being created by the space rocket corporation Energia.

“When we launch our new rocket for the first time, approximately in three years from now, we also plan to flight-test a cargo spacecraft. Roscosmos might order six space launches from us, thus keeping busy both its own enterprises and S7 Space,” Sopov said.

S7 originally was reworking the Sea Launch rocket so that it was built entirely in Russia, and had said it would resume flights by 2019 with twelve scheduled through 2022. Now it appears they have been hired by Roscosmos to build an entirely new launch vehicle and cargo freighter, in imitation of the U.S. approach to have private companies build its space rockets and craft.

Regardless, this is not encouraging. It indicates more delays, and it also suggests that S7 is not really in control of its future but has to take orders from Roscosmos.

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SpaceX to build test prototype of BFS, test on Falcon 9

8:36 am

Capitalism in space: SpaceX announced today that it is building a test prototype of its Big Falcon Spaceship, the upper stage of its Big Falcon Rocket, and it will use the Falcon 9 to do orbital flight tests.

Musk in a tweet said that they hope to to do the first flight by June 2019. Musk also said that they will not be testing vertical landing with this prototype, focusing instead on atmospheric re-entry. From this I can only assume it will not be recovered after its return to Earth.

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Soyuz from French Guiana successfully launches weather satellite

6:00 pm

A Russian Soyuz rocket tonight successfully launched a European weather satellite from French Guiana.

This success once again indicates that the manned Soyuz launch in December to ISS can take place as scheduled.

Though this was a Russian rocket, I count it as a Arianespace launch, as it is launched from their launchpad. Arianespace is also the operator and sales agent for the rocket. Obviously, this is open to interpretation.

The leaders in the 2018 launch race:

31 China
17 SpaceX
10 Russia
8 ULA
8 Europe (Arianespace)

China remains the leader in the national rankings, 31 to 26 over the U.S.

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Bennu’s two hemispheres

9:05 am

Bennu's two hemispheres

The image above of the two hemispheres of the asteroid Bennu, cropped and reduced very slightly to post here, was created from several images taken by OSIRIS-REx on two different days last week.

These two super-resolution views of asteroid Bennu were created using eight 2.5-millisecond exposure images captured by OSIRIS-REx on two separate days. The view on the left is composed of eight PolyCam images taken over the span of two minutes on Nov. 1, 2018, when the spacecraft was about 126 miles (203 km) from the asteroid. The one on the right – showing the opposite side of the asteroid – was generated using eight images taken during the same two-minute time slot on Nov. 2, from a distance of about 122 miles (196 km).

The rock on the southern limb is the same in both images, merely seen from opposite sides. Bennu appears very similar to Ryugu, except that there do appear to be dark areas on its surface, possibly crater sites, that might be smooth enough for landing.

The rendezvous at Bennu will occur on December 3.

UPDATE: The OSIRIS-REx science team has now released a short movie showing Bennu’s rotation as imaged during this same time period.

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SpaceX’s Tesla passes Mars’ orbit

8:54 am

Capitalism in space: The Tesla roadster that was put into solar orbit by the first Falcon Heavy launch in February has now successfully flown beyond Mars’ orbit.

The significance of this achievement is that this payload was put into solar orbit by a private company, using its own funds. The government had nothing to do with it.

For the entire history of the space age such a thing was considered absurd and impossible. You needed government to fund and build these big space projects. With this launch SpaceX and Elon Musk once again demonstrated how that accepted wisdom was bunk.

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NASA completes final parachute test for 2020 Mars rover mission

8:48 am

NASA has completed the third and final parachute test for its as yet unnamed 2020 Mars rover mission.

Three separate test launches (one Oct. 9, 2017, April 20, 2018, and Sept. 7, 2018) determined which parachute design would be used for the Mars 2020 mission. In 2012, a similar parachute concept was used for the Curiosity rover mission.

For this test, NASA said the parachute, which was made of nylon, Kevlar and Technora fibers, was packed into a “small drum-sized bag” before being launched to an altitude of about 23 miles (37 kilometers) and a speed of about Mach 1.8. Then, within less than a half-second, the 180-pound parachute was deployed and fully inflated with a volume of “a large house.”

Though doing engineering tests to prove your concept always makes sense, didn’t NASA do this for Curiosity, which then proved its parachute concept further by actually landing on Mars successfully? The 2020 rover is supposed to be saving money by using the Curiosity design. Why were these tests necessary?

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Luxembourg awards prize to Taiwan company

8:39 am

Capitalism in space: A Taiwanese company has won Luxembourg’s second SpaceResources.lu challenge, winning €500K.

Initiated by the ESA, the Space Exploration Masters competition targets participants from all around the world. A total of 7 prizes were awarded in collaboration with international partners, including a 500.000 euros prize by the Luxembourg Space Agency.

ODYSSEUS Space is a startup created in 2016 with the aim to provide innovative technologies and solutions for future deep space and swarm small satellite missions. To date, ODYSSEUS Space team members have participated in over 15 small satellite missions from 7 different countries.

As part of the deal, the company will move its headquarters from Taiwan to Luxembourg.

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Oumuamua might be artificial lightsail

3:45 pm

A new analysis of the velocity and path of the interstellar object Oumuamua suggests it might be an artificial lightsail.

The study, which was posted online earlier this month, suggests that Oumuamua’s strange “excess acceleration” could be artificial in nature, as it has been implied that it is not an active comet. “Considering an artificial origin, one possibility is that ‘Oumuamua is a lightsail, floating in interstellar space as a debris from an advanced technological equipment,” researchers wrote in the paper.

The paper continues: “Lightsails with similar dimensions have been designed and constructed by our own civilization, including the IKAROS project and the Starshot Initiative. The lightsail technology might be abundantly used for transportation of cargos between planets or between stars.”

They even theorized that Oumuamua “may be a fully operational probe sent intentionally to Earth vicinity by an alien civilization,” though that scenario was called “exotic.”

All of this is speculation. However, that the object is moving faster than expected, based on the initial data of its path, is quite intriguing. The authors of the paper concluded that the excess speed was caused by “solar radiation pressure.” They also calculated that for the light pressure to cause that increase in speed as it moves away requires it to have a large surface area.

The observations are not sufficiently sensitive to provide a resolved image of ‘Oumuamua, and one can only speculate on its possible geometry and nature. Although periodic variations in the apparent magnitude are observed, there are still too many degrees of freedom (e.g., observing angle, non-uniform reflectively, etc.) to definitely constrain the geometry. The geometry should not necessarily be that of a planar sheet, but may acquire other shapes, e.g., involving a curved sheet, a hollow cone or ellipsoidal, etc. Depending on the geometry our estimated value for the mass-to-area ratio will change, but the correction is typically of order unity.

They then speculate the possibility of the object being an interstellar probe.

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Airbus to deliver the first Orion service module to NASA this week

8:44 pm

My heart be still! Airbus will deliver this week the first Orion service module to NASA.

Airbus will deliver the first European Service Module (ESM) for NASA’s Orion spacecraft from its aerospace site in Bremen, Germany on 5 November 2018. An Antonov cargo aircraft will fly the ESM to NASA’s Kennedy Space Center in Florida, USA. This is the result of four years of development and construction, and represents the achievement of a key milestone in the project. ESA selected Airbus as the prime contractor for the development and manufacturing of the first ESM in November 2014.

Four years to simply build a single manned capsule’s service module. At this pace we might be able to colonize Mars and the Moon in about 200 years, maybe!

Note however that NASA only has funding to build 1.5 of these European service modules. It is possible that Congress has allocated additional funds, but if so, I missed it.

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Russia launches another Soyuz, placing GPS-type satellite in orbit

8:39 pm

Russia today successfully placed a Glonass GPS-type satellite in orbit using a variation of its Soyuz rocket.

This is the second launch of a Soyuz since the October 11 manned launch failure. Though both launches used versions different from the October 11 rocket, the first stage strap-on boosters as well as second core stage were the same, providing strong proof that the December manned launch to ISS can go on as planned.

The leaders in the 2018 launch race:

31 China
17 SpaceX
10 Russia
8 ULA
7 Europe (Arianespace)

China still leads the U.S. 31 to 26 in the national rankings.

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Musk endorses Trump’s Space Force proposal

9:28 am

In a long hour long interview (which you can listen to at the link), Elon Musk endorsed President Trump’s proposal to create a Space Force.

Elon Musk sees a new branch of the U.S. Armed Forces as “obvious” as Americans travel far off the planet. “It’s basically defense in space. And then I think also it could be pretty helpful for maybe expanding our civilization,” Musk told Kara Swisher on a new episode of Recode Decode. “I do think it will become obvious over time that a Space Force is a sensible thing to do.”

Donald Trump pitched the new military operation this year, and hopes to have it running by 2020, bringing the military into conversation with space leaders like NASA and Musk’s SpaceX. It would sit alongside branches like the Army and the Air Force.

Musk described the agency as similar to the Air Force, something he said was criticized as unnecessary when air wars were managed by the Army but which is now a specialized division. “And people today may not realize back then it was wildly penned as a ridiculous thing to create the Air Force, but now everyone’s like, ‘Obviously you should have an Air Force,’” Musk said. “And I think it’s gonna become obvious that we should have a Space Force, too.”

I don’t have time now to listen to the hour-plus-long interview, but it appears Musk talked about other things of interest, making worth one’s time.

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Danish astronomers question gravitational wave detection

9:23 am

The uncertainty of science: A team of Danish astronomers have questioned the gravitational wave detection achieved in the past few years by the LIGO gravitational wave telescopes.

The details are complex and very much in dispute, and the position of these Danish astronomers is very much in the minority, but their doubts have not been dismissed, and illustrate well the best aspects science. The article also outlines how the physics community and the LIGO scientists have welcomed the skepticism, even as they have doubts about the claims of the Danish astronomers. This is the hallmark of good science, and lends weight to the work at LIGO.

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Head of Webb investigation: Webb was “a step too far”

9:11 am

The head of an investigation panel into the James Webb Space Telescope admitted this week that, though he and the panel fully support the telescope’s completion and launch, he also believes the telescope was too ambitious and “a step too far.”

Speaking at a meeting of the Committee on Astronomy and Astrophysics of the National Academies’ Space Studies Board Oct. 29, Tom Young said that while the mission may ultimately be a success, its difficulties provide lessons as NASA considers future large astronomy missions in the next decadal survey.

“I, personally, have come to the conclusion that JWST had too many inventions, too much risk, and was a step too far,” he said at the end of a presentation about the review board’s work.

Young emphasized that he was neither opposed to JWST being completed nor had doubts it could be done successfully. “There are a group people who are diehard supporters of JWST, and there are others who support it, but they’re really angry at the cost growth and the schedule delays,” he said.

You think? Webb was supposed to cost about $500 million, and launch in 2007. Its budget is now almost $10 billion, and it will not launch before 2021. In the process it has destroyed the entire astronomy program at NASA, preventing the construction of any other space telescopes.

The key question is whether the astronomy community or NASA has learned anything from this disaster. I personally am doubtful, since they are still pushing for WFIRST, a similar big boondoggle that will cost billions and is already overbudget and behind schedule, though it is only in its design stage.

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Russians say Soyuz sensor was damaged in manufacture

9:04 am

The Russians yesterday revealed that the sensor they have identified as the cause of the October 11 Soyuz launch failure was damaged during manufacture.

Their response:

Skorobogatov said officials are now taking steps, including putting all assembly staff through competence tests and additional training, to make sure such malfunctions don’t happen again.

The rocket producer will also take apart two other rockets that have been recently assembled and are due to launch in the coming weeks and then re-assemble them, Skorobogatov said.

They do not say how the damage occurred. It also appears that, like all government run operations, no one will be fired. (The Russians only fire people when they are going to criminally indict them.)

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Dawn’s last look at Ceres

10:14 am

Ceres

The Dawn mission has ended, and the image on the right, reduced to post here, is one of its last views of Ceres, with the bright spots of Occator Crater clearly visible, before its fuel ran out. You can see the full resolution image by clicking on the image.

This photo of Ceres and the bright regions in Occator Crater was one of the last views NASA’s Dawn spacecraft transmitted before it depleted its remaining hydrazine and completed its mission.

This view, which faces south, was captured on Sept. 1, 2018 at an altitude of 2,340 miles (3,370 kilometers) as the spacecraft was ascending in its elliptical orbit. At its lowest point, the orbit dipped down to only about 22 miles (35 kilometers), which allowed Dawn to acquire very high-resolution images in this final phase of its mission. Some of the close-up images of Occator Crater are shown here.

Occator Crater is 57 miles (92 kilometers) across and 2.5 miles (4 kilometers) deep and holds the brightest area on Ceres, Cerealia Facula in its center and Vinalia Faculae in its western side. This region has been the subject of intense interest since Dawn’s approach to the dwarf planet in early 2015.

If NASA made any specific announcement about the end of the mission, I have missed it. Either way, this end is not a surprise, because they have made it clear for the past few months that the spacecraft was about to run out of fuel.

They have also posted today an image of Ceres’ largest mountain, Ahuna Mons.

Update: Even as I posted this, NASA sent out this press release: NASA’s Dawn mission comes to an end

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China tests its own grasshopper

10:02 am

China has completed its first vertical rocket landing test, using a prototype small scale first stage very similar to SpaceX’s Grasshopper test rocket.

If I was cynical, I’d say that this isn’t just similar, it is a direct steal from Grasshopper. But then, that is generally how the Chinese have come up with their new technology, not by creating it themselves, but by stealing ideas from others and then upgrading them.

Either way, this test shows that China is devoting serious energy to making its first stages reusable.

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Company focused on cleaning up space junk raises $50 million

9:54 am

Capitalism in space: Astroscale, a Japanese company with British ties, has raised $50 million in investment capital for developing a robot spacecraft for locating and removing space junk from orbit.

The company plans to use the funding to support several ongoing efforts, including the development of a technology demonstration satellite called ELSA-d. That spacecraft, scheduled for launch in early 2020 on a Soyuz rocket, will feature “target” and “chaser” satellites to demonstrate rendezvous and proximity operations. The target spacecraft is being built by British smallsat developer Surrey Satellite Technology Ltd. under a contract announced last November.

The funding will support scaling up an operations center Astroscale established in the United Kingdom in 2017 that also handles engineering, procurement and business development. Astroscale said it plans to establish an office in the United States in 2019.

The article notes also that much of this money comes from Japanese investors, including Mitsubishi, and reflects a growing interest in Japan in private commercial space.

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Planetary Resources bought by blockchain company

9:47 am

Capitalism in space: The so-called asteroid mining company Planetary Resources has now been bought by computer blockchain company.

Planetary Resources said in a statement that it was acquired by ConsenSys, Inc. in an “asset-purchase transaction.” The companies did not disclose specific terms of the agreement. Chris Lewicki, the president and chief executive of Planetary Resources, and Brian Israel, the company’s general counsel, will join ConsenSys as part of the deal.

ConsenSys describes itself as a “blockchain venture production studio focused on building and scaling tools, disruptive startups, and enterprise software products powered by decentralized technology, specifically Ethereum.” Ethereum itself is a decentralized computing platform best known for supporting a cryptocurrency called Ether similar to the better-known bitcoin.

Don’t ask me how ConsenSys makes its money. I haven’t the faintest. I also haven’t the slightest idea what they intend to do with Planetary Resources. I can say without doubt that it won’t be asteroid mining.

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