November 4, 2020 Zimmerman/Batchelor podcast
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Category: Behind The Black
Die Twinnies – Bayernmädels
An evening pause: Hat tip Jim Mallamace, who writes,
Good friends, Astrid Paster and Franziska Pauli, are Die Twinnies. This was the girls’ debut TV performance for the popular Austrian entertainment show, “Musikantenstadl.”
This was recorded in 2009. It is said the career length of a child entertainer is about the same as the lifespan of a pet. That was pretty much true for Die Twinnies. We enjoy such performances while we can.
It might be lip-synched, but so what? Fun stuff.
SpaceX launches Space Force GPS satellite
Capitalism in space: SpaceX tonight successfully launched the GPS satellite that on a previous launch had experienced a launch abort at T-2.
This was a completely new Falcon 9 rocket, with two of its original engines replaced after the company had traced the issue that caused the launch abort. The first stage successfully landed on the drone ship in the Atlantic Ocean, and will fly again on the next GPS launch by SpaceX for the Space Force.
The satellite has been deployed successfully, completing the launch.
The leaders in the 2020 launch race:
27 China
19 SpaceX
12 Russia
4 ULA
4 Europe (Arianespace)
4 Rocket Lab
The U.S. now leads China 30 to 27 in the national rankings.
Rocket Lab will try to recover 1st stage on next launch
Capitalism in space: Rocket Lab announced today that it will attempt to recover the 1st stage of its Electron rocket on its next launch, using parachutes to slow its descent into the ocean and then fishing from the sea.
On its next mission set for liftoff later this month, Rocket Lab will try to recover the first stage of its Electron small satellite launcher after parachuting into the Pacific Ocean downrange from the company’s privately-run spaceport in New Zealand, officials announced Thursday.
The attempt to retrieve the Electron rocket’s first stage moves Rocket Lab closer to eventually capturing falling boosters in mid-air with a helicopter, then reusing the hardware. The reuse initiative is aimed at increasing Rocket Lab’s flight rate, and could result in cost savings, according to Peter Beck, the company’s founder and CEO.
The flight is presently scheduled for November 15 from New Zealand. It appears the goal with this recovery is not to reuse the 1st stage, but to recover it so they can determine how it fared during re-entry. For re-use they will capture the first stage using a helicopter, before splashdown and is exposed to saltwater.
When they attempt the helicopter capture on an actual launch remains unclear.
Terraced mesa inside Martian depression
Click for full image.
Cool image time! The photo to the right, cropped and reduced to post here, was taken on July 1, 2020 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows a very puzzling terraced mesa inside an enclosed depression or sinkhole (the western half of which can be seen in the full image).
What caused that mesa? A first scan of the image and the data suggests we are looking at sinkage related to the melting of an underground ice table. The latitude here is 34 degrees south, just far enough away from the equator for glacial activity to be possible. Moreover, the small circular depression in the upper right of the image strongly suggests an impact crater into slushy material. The implication is that this depression is the result of the melting or sublimation of underground ice, leaving behind a mesa that is made of solider stuff.
Another possibility is that the terraced mesa is actually the remains of glacial material. In the full image features inside other nearby depressions are terraced also, but are also much more reminiscent of glacial features found in many craters in the mid-latitudes. The depression is also close to the headwaters of Reull Valles, a meandering canyon where many images have shown glacial features (see for example here, here, and here).
These features however could also have nothing to do with water ice.
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Starship hop tentatively set for Nov 9-11
Capitalism in space: Based on SpaceX’s road closure requests, it now appears that the 50,000 foot hop by the eighth Starship prototype will occur sometime between November 9th and November 11th.
This schedule remains very uncertain, as the company needs to do other tests before the hop. Depending on when these tests happen and what they learn after each, the overall schedule might change.
Bezos sells another $3 billion of Amazon shares
Jeff Bezos continues to accelerate his sale of his Amazon stock, selling another $3 billion this week.
In August, Bezos offloaded more than $3.1 billion of Amazon shares, after selling more than $4.1 billion worth of shares in February. The sales this week bring his total cash out in 2020 to more than $10.2 billion so far, which is a notable jump from 2019, when Bezos sold $2.8 billion worth of shares.
While Bezos had originally said these sales were for financing his space company, Blue Origin, it now appears that the bulk of this new money is aimed at funding environmental political organizations such as the Environmental Defense Fund, the Natural Resources Defense Council and the World Wildlife Fund.
Overview of China’s lunar sample return mission
Link here. The Chinese mission, the first to bring back lunar samples since the 1970s, is now set for launch on November 24, 2020.
Chang’e-5 includes a lander, ascender, orbiter and returner. After the spacecraft enters the Moon’s orbit, the lander-and-ascender pair will split off and descend close to Mons Rümker, a 1,300-metre-high volcanic complex in the northern region of Oceanus Procellarum — the vast, dark lava plains visible from Earth. Once the craft has touched down, it will drill up to 2 metres into the ground and extend a robotic arm to scoop up about 2 kilograms of surface material. The material will be stored in the ascender for lift-off.
The descent and ascent will take place over one lunar day, which is equivalent to around 14 Earth days, to avoid the extreme overnight temperatures that could damage electronics, says Clive Neal, a geoscientist at the University of Notre Dame in Indiana.…Once the ascender is back in lunar orbit, the samples will be transferred to the returner. This in-flight rendezvous will be complex and “a good rehearsal for future human exploration”, says James Carpenter, a research coordinator for human and robotic exploration at the European Space Agency in Noordwijk, the Netherlands. China plans to send people to the Moon from around 2030.
The Chang’e-5 spacecraft will then journey back to Earth, with the lander parachuting toward Siziwang Banner in Inner Mongolia, northern China, probably sometime in early December.
The location, as shown in the image above, is in the northern mid-latitudes of the Moon’s nearside, and is a place where some relatively recent volcanic activity might have occurred, though still in the far past.
Lyrebird sings Australia
An evenig pause: Hat tip Tom Biggar.
Why Martian mountains are different than on Earth
Click for full image.
Cool image time! The photo to the right, rotated, cropped, and reduced to post here, was taken on August 12, 2020 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows what to any Earthling’s eye appears to be a somewhat ordinary flat-topped mountain peak with two major flanking ridgelines descending downward to the north and the south, and two minor ridgelines descending to the northwest and southwest.
This peak and its landscape would surely be quite a spectacularly place to visit, should humans ever settle Mars and begin doing sightseeing hikes across its more interesting terrain. I can definitely imagine hiking trails coming up the two minor ridges, with a crest trail traversing the main north-south ridge across the peak.
This is not however a mountain on Earth. It is on Mars, which makes its formation and evolution over time fundamentally different than anything we find on Earth, despite its familiar look.
First, what formed it? Unlike most of Earth’s major mountain chains, the mountains of Mars were not formed by the collision of tectonic plates, squeezing the crust upward. Mars does not have plate tectonics. Most of its mountains formed either from the rise of volcanoes at single hot spots, or from the wearing away of the surrounding terrain to leave behind a peak or mesa.
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First fast radio burst detected in Milky Way
Astronomers using both space- and ground-based telescopes have detected for the first time a fast radio burst occurring inside the Milky Way, finding that it came from a magnetar, a pulsar with an extremely powerful magnetic field.
The radio component was discovered by the Canadian Hydrogen Intensity Mapping Experiment (CHIME), a radio telescope located at Dominion Radio Astrophysical Observatory in British Columbia and led by McGill University in Montreal, the University of British Columbia, and the University of Toronto.
A NASA-funded project called Survey for Transient Astronomical Radio Emission 2 (STARE2) also detected the radio burst seen by CHIME. Consisting of a trio of detectors in California and Utah and operated by Caltech and NASA’s Jet Propulsion Laboratory in Southern California, STARE 2 is led by Bochenek, Shri Kulkarni at Caltech, and Konstantin Belov at JPL. They determined the burst’s energy was comparable to FRBs.
By the time these bursts occurred, astronomers had already been monitoring their source for more than half a day.
Late on April 27, NASA’s Neil Gehrels Swift Observatory spotted a new round of activity from a magnetar called SGR 1935+2154 (SGR 1935 for short) located in the constellation Vulpecula. It was the object’s most prolific flare-up yet – a storm of rapid-fire X-ray bursts, each lasting less than a second. The storm, which raged for hours, was picked up at various times by Swift, NASA’s Fermi Gamma-ray Space Telescope, and NASA’s Neutron star Interior Composition Explorer (NICER), an X-ray telescope mounted on the International Space Station.
Later observations detected X-rays from the same source. While this does not prove that all fast radio bursts come from magnetars, it does prove that at least some do.
New owners for Vector to revive company
Capitalism in space: The new owners for bankrupt smallsat rocket company Vector have announced that they plan to revive the company.
In their announcement they confirmed that the key problem that killed the original company were engineering issues with its chosen engine design.
One thing they did wrong was the technology the used for their engines. “They had some Achilles’ heels associated with their technical approach. They were trying to use a propellant combination that was untested in the industry,” said Chris Barker, who serves as Vector’s chief rocket scientist. “They were struggling with trying to get performance that they knew they needed for a small launcher to be successful, and ultimately their test program was unsuccessful.”
Vector had been developing engines that used propylene and liquid oxygen propellants. The new Vector plans to instead use engines powered by a more conventional combination of liquid oxygen and refined kerosene, or RP-1, propellants. Barker has been developing such engines since the 1990s for companies such as Space America and Earth to Sky.
The new owners also stated that initially they plan to target the suborbital business field. Their main focus right now is redesigning the Vector-R rocket in conjunction with their engines.