Year: 2017

MU69 might have a moon

1:51 pm

Worlds without end: Observations of stellar occultations this past summer of 2014 MU69, New Horizons’ Kuiper belt target for a January 1, 2019 fly-by, suggest that the object is not only very elongated or two objects practically touching as they orbit around each other, but it might have a moon orbiting it.

The data that led to these hints at MU69’s nature were gathered over six weeks in June and July, when the team made three attempts to place telescopes in the narrow shadow of MU69 as it passed in front of a star. The most valuable recon came on July 17, when five telescopes deployed by the New Horizons team in Argentina were in the right place at the right time to catch this fleeting shadow — an event known as an occultation – and capture important data on MU69’s size, shape and orbit. That data raised the possibility that MU69 might be two like-sized objects, or what’s known as a binary.

The prospect that MU69 might have a moon arose from data collected during a different occultation on July 10, by NASA’s airborne Stratospheric Observatory for Infrared Astronomy (SOFIA). Focused on MU69’s expected location while flying over the Pacific Ocean, SOFIA detected what appeared to be a very short drop-out in the star’s light. Buie said further analysis of that data, including syncing it with MU69 orbit calculations provided by the European Space Agency’s Gaia mission, opens the possibility that the “blip” SOFIA detected could be another object around MU69. “A binary with a smaller moon might also help explain the shifts we see in the position of MU69 during these various occultations,” Buie added. “It’s all very suggestive, but another step in our work to get a clear picture of MU69 before New Horizons flies by, just over a year from now.”

All of this is somewhat speculative. We really won’t know until New Horizons arrives next year.

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Faults on Mars

9:20 am

Faults on Mars

Cool image time! The Mars Reconnaissance Orbiter (MRO) image on the right, reduced in resolution to post here, captures a distinctive fault line that cuts across some layered deposits. As noted by the MRO science team,

Some of the faults produced a clean break along the layers, displacing and offsetting individual beds (yellow arrow).

Interestingly, the layers continue across the fault and appear stretched out (green arrow). These observations suggest that some of the faulting occurred while the layered deposits were still soft and could undergo deformation, whereas other faults formed later when the layers must have been solidified and produced a clean break.

Meridiani Planum

These layers are located in Meridiani Planum, a relatively flat area on the Martian equator. Opportunity landed on this plain to the southwest of this region, as shown on the geology map to the left. The white cross in the southwest corner indicates Opportunity’s landing site, with Endeavour Crater just to the southeast. The white box in the northwest shows where the faulted layered deposits are located. Based on the scale of the map, this places Opportunity approximately 400 miles away.

What exactly caused these distinct faults remains unknown. The likely cause would be a earthquake, but since Mars does not have plate tectonics like the Earth, earthquakes would have to be caused by other geological processes not yet studied.

To my eye, they look like cracks in a mirror, though this provides no real explanation other than it illustrates how cool the image is.

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Flying through Jupiter’s Great Red Spot

8:40 am

Cool movie time! In conjunction with the release yesterday of data from Juno’s first close fly-over of Jupiter’s Great Red Spot, the science team also released an animation of what it would be like to fly down into the Spot.

You can also download the mp4 file here. It is definitely worth watching. It illustrates forcefully how daunting and challenging it will be for the human race to ever explore the vastness of Jupiter. This simulated plunge only goes into the Great Red Spot a few hundred miles, and barely touches its dynamics.

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Rocket Lab launch aborted at engine start

10:27 pm

Capitalism in space: The second test flight of Rocket Lab’s Electron rocket was aborted just after engine start today (December 12 in New Zealand).

Members of Rocket Lab’s launch team called out ignition of the first stage’s engines as the countdown ticked off the final few seconds before liftoff, followed by an abort.

“Umbilicals in, power’s all up,” one member of the launch team called out over a loop broadcast on Rocket Lab’s live video stream. “Confirm Stage 1 engines have stopped,” an engineer later announced.

A countdown graphic on Rocket Lab’s video feed stopped at T-minus 2 seconds. “As you can see, the vehicle had an abort during the launch auto sequence,” said Daniel Gillies, Rocket Lab’s mission management and integration director who provided commentary on the company’s webcast. “At this stage of flight, the vehicle flight computer is actively monitoring a wide range of vehicle performance parameters, and when any of these parameters are violated, the vehicle determines that its not ready of flight and holds the count.”

The rocket is fine. Though they have not said what caused the abort, they have set their next launch attempt for two days from now, in the evening in the U.S.

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No Strings A Cappella – Past Three O’ Clock

6:01 pm

An evening pause: Though written as celebration of the birth of the baby Jesus, I think the lyrics really apply all newborns. As William Wordsworth said, we arrive “trailing clouds of glory.”

past three o’clock,
on a cold frosty morning,
past three o’clock,
good morrow masters all.

born is a baby
gentle as may be,
son of the Eternal
Father supernal.

mid earth rejoices
hearing such voices.
ne’ertofore so well
carolling nowell!

cheese from the dairy
bring they for Mary,
and, not for money,
butter and honey.

thus they: i pray you,
up sirs, nor stay you
till ye confess him
likewise and bless him.

Hat tip Edward Thelen.

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Juno’s look at Jupiter’s Great Red Spot

3:10 pm

The Juno science team released its results from the spacecraft’s first close fly over of Jupiter’s Great Red Spot in July 2017.

Jupiter’s Great Red Spot is a giant oval of crimson-colored clouds in Jupiter’s southern hemisphere that race counterclockwise around the oval’s perimeter with wind speeds greater than any storm on Earth. Measuring 10,000 miles (16,000 kilometers) in width as of April 3, 2017, the Great Red Spot is 1.3 times as wide as Earth.

“Juno found that the Great Red Spot’s roots go 50 to 100 times deeper than Earth’s oceans and are warmer at the base than they are at the top,” said Andy Ingersoll, professor of planetary science at Caltech and a Juno co-investigator. “Winds are associated with differences in temperature, and the warmth of the spot’s base explains the ferocious winds we see at the top of the atmosphere.”

The future of the Great Red Spot is still very much up for debate. While the storm has been monitored since 1830, it has possibly existed for more than 350 years. In the 19th century, the Great Red Spot was well over two Earths wide. But in modern times, the Great Red Spot appears to be diminishing in size, as measured by Earth-based telescopes and spacecraft. At the time NASA’s Voyagers 1 and 2 sped by Jupiter on their way to Saturn and beyond, in 1979, the Great Red Spot was twice Earth’s diameter. Today, measurements by Earth-based telescopes indicate the oval that Juno flew over has diminished in width by one-third and height by one-eighth since Voyager times.

The storm’s estimate depth, about 200 miles, seems gigantic, but then we must remember this storm is on a gas giant that is about 88k miles in diameter, about ten times larger than Earth. The relative size of this storm to the size of Jupiter therefore is really not that much different than the relative size of big hurricanes on Earth. At the same time, the realities here are daunting, filled with unknowns, chief of which is the fact that unlike Earth, the Great Red Spot is a storm that is floating high in the atmosphere with no solid surface below it.

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Trump signs new space policy directive, making Moon 1st priority again

2:57 pm

Yawn. President Trump today signed a new space policy directive that makes the Moon the U.S.’s first exploration priority again.

“The directive I am signing today will refocus America’s space program on human exploration and discovery,” said President Trump. “It marks a first step in returning American astronauts to the Moon for the first time since 1972, for long-term exploration and use. This time, we will not only plant our flag and leave our footprints — we will establish a foundation for an eventual mission to Mars, and perhaps someday, to many worlds beyond.”

As I wrote above, yawn. Same old same old. In 2004 Bush declared we will go to the Moon. In 2010 Obama declared we will go to an asteroid. In 2017 Trump declares we will go to the Moon.

In all those years, where have we actually gone? Nowhere. The government’s effort during all that time to build a rocket and a manned spacecraft to do any of this stuff has come up completely empty. Neither will carry humans into space for at least another five years, if not longer.

The only thing these empty promises have accomplished is to waste a god-awful amount of taxpayer money, now about $33 billion, with appropriations likely to increase that to more that $43 billion before that first manned SLS/Orion flight.

I predict that this government promise will come up empty as well, at least in the manner the government and NASA is trying to sell it. It won’t be the government rocket and capsule that will get us back to the Moon, but a host of new private companies, making profits and doing things efficiently and fast, that will get us there. And I am firmly confident that they will do it before the government even gets off the ground.

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New method to 3D print entire objects simultaneously, without layering

10:56 am

Life imitates science fiction: Engineers at Lawrence Livermore Lab have developed a new 3D method that creates entire objects in one piece instead of building them up with layering.

Developed by LLNL in collaboration with UC Berkeley, the University of Rochester, and MIT, volumetric printing replaces layering with a process that creates the entire object simultaneously. It does this by using three overlapping lasers beamed in a hologram-like pattern into a transparent tank filled with photosetting plastic resin. A short exposure by a single beam isn’t enough to cure the resin in a short time, but combining three lasers can induce curing in about ten seconds. After the object is formed, the excess resin is then drained off to reveal the complete unit.

“The fact that you can do fully 3D parts all in one step really does overcome an important problem in additive manufacturing,” says LLNL researcher Maxim Shusteff. “We’re trying to print a 3D shape all at the same time. The real aim of this paper was to ask, ‘Can we make arbitrary 3D shapes all at once, instead of putting the parts together gradually layer by layer?’ It turns out we can.”

Volumetric printing is not only faster, but eliminates the need for temporary support structures, is more flexible, and provides more geometric flexibility. So far, it’s been used to create squares, beams, planes, struts at arbitrary angles, lattices, and complex, curved objects.

The process still has problems, as the article describes. Nonetheless, this is just one more step in the invention process that is making a Star Trek replicator possible.

Hat tip reader Mike Buford.

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Breakthrough Listen to observe Ourmuamua

10:47 am

Breakthrough Listen, one of billionaire Yuri Milner’s Breakthrough initiatives, is going to do an observation campaign of the interstellar object Ourmuamua using the Green Bank Radio telescope.

It has a highly unusual structure for an asteroid – an elongated cigar shape, hundreds of meters in length but with width and height perhaps only one tenth as long.

Researchers working on long-distance space transportation have previously suggested that a cigar or needle shape is the most likely architecture for an interstellar spacecraft, since this would minimize friction and damage from interstellar gas and dust. While a natural origin is more likely, there is currently no consensus on what that origin might have been, and Breakthrough Listen is well positioned to explore the possibility that ‘Oumuamua could be an artifact.

Listen’s observation campaign will begin on Wednesday, December 13 at 3:00 pm ET. Using the Robert C. Byrd Green Bank Telescope, it will continue to observe ‘Oumuamua across four radio bands, from 1 to 12 GHz. Its first phase of observations will last a total of 10 hours, divided into four “epochs” based on the object’s period of rotation.

If anything, this observation will provide us more information about Ourmuamua itself, which unfortunately is very limited because the object was already on its way out when it was discovered.

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Lawsuit reveals two customers for Soyuz circumlunar tourist flight

8:50 am

Capitalism in space: A lawsuit against Space Adventures, the company that has previously organized tourist trips to ISS using Russian rockets, has finally revealed the names of the two individuals who had purchased tickets for a circumlunar flight around the Moon using a modified Soyuz capsule.

The details are included in a lawsuit now winding its way through U.S. District Court in Virginia. Harald McPike, a wealth Austrian investor and adventurer who resides in the Bahamas, has sued Space Adventures, its chairman and CEO Eric Anderson, and its president Thomas Shelley seeking to recover the $7 million down payment he put down on the flight in March 2013.

The other lunar tourist? The lawsuit says Space Adventures told McPike that it was Anousheh Ansari, who flew to the International Space Station (ISS) as a tourist in 2006 on a Soyuz in a deal the company brokered with the Russians. Ansari’s family also sponsored the $10 million Ansari X Prize won by Burt Rutan’s SpaceShipOne in 2004.

The dispute centers on McPike’s realization, after paying $7 million of the $30 million down payment, that Space Adventures probably could not deliver on its promises, mostly because of a Russian reluctance to sent tourists on such a mission. He wants his money back, and Space Adventures doesn’t want to return it.

While several modified Soyuz capsules, called Zond, were sent around the Moon during the 1960s, that was a very long time ago. Configuring the modern Soyuz for such a manned mission would require a lot of work, and I suspect the Russians didn’t want to do it without money up front. Moreover, I’m not even sure that the $300 million from the two tourists would have been sufficient.

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