Spring Creek – Hello Operator
An evening pause: How about some bluegrass?
Hat tip Edward Thelen.
Year: 2016
A detailed look at SpaceX’s Raptor engine
Link here. This story confirms for me a thought I had had while I watched Elon Musk’s talk last week outlining his proposed Interplanetary Transport System: SpaceX is still a good long way from actually building this rocket, since they have barely begun developing the rocket engine. They have made excellent progress in engine development, but they have a lot to do, with many pitfalls certain.
I therefore think that the company will be relying on its Falcon 9 and Falcon Heavy rockets, with their Merlin engines, for many more years to come.
September 29, 2016 Zimmerman/Batchelor podcast
Embedded below the fold. Spent a lot of time talking about the Russian Sea Launch deal and the Sierra Nevada UN deal, as well as the Mars rovers.
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Dark matter unnecessary?
The uncertainty of science: A new analysis of the infrared data from 153 galaxies using the Spitzer Space Telescope suggests that dark matter might not be necessary to explain the rotation of galaxies.
First, this concise and nicely written explanation from the link of why dark matter has been proposed:
Newton’s laws of motion predict that planets that revolve closer to a star move faster than those that are farther away. In principle this should also hold true for stars circling the cores of galaxies, but for nearly a century, astronomers have seen that stars near the outskirts of galaxies orbit at nearly the same velocities as ones near galactic centers.
To explain why these outlying stars travel as quickly as they do without flying out into the void beyond, researchers came up with the idea of dark matter, a substance whose gravitational pull is thought to keep whirling stars in check. Scientists have largely ruled out all known particles as possible explanations for dark matter, and the consensus is that dark matter must be a kind of invisible, intangible material that is only detectable via its gravitational influence.
However, despite decades of trying, researchers have failed to capture a single mote of dark matter, even though it is supposed to make up roughly five-sixths of all matter in the universe. This raises the possibility that dark matter might not be real.
The new research, which I must admit I do not really understand, supposedly suggests that dark matter is unnecessary to explain the motions of stars.
Previous analyses of the orbital velocities of the stars in galaxies often depended on visible wavelengths of light. However, the stars that produce the most visible light are relatively short-lived and prone to fluctuations, and so may not provide the best picture of how matter is scattered overall throughout a galaxy. Instead, McGaugh and his colleagues analyzed near-infrared images collected by NASA’s Spitzer Space Telescope over the past five years. “The stars that generate the most near-infrared light are red giants, that are pretty stable in their output, and so are much better representative of a galaxy’s total mass of stars,” McGaugh said.
The researchers found an extraordinarily close association between the location of normal matter and the way it accelerates around the centers of galaxies. “We were surprised at how tight that relationship was,” McGaugh said. “It looks tantamount to a law of nature.”
Neither the article nor the scientists who did this research however explain clearly how this tight association negates the need for dark matter.
Sabotage?
The competition really heats up: The SpaceX investigation into the September 1 Falcon 9 launchpad explosion has apparently also included looking into the possibility that sabotage could have played a part.
As part of the investigation, SpaceX officials had come across something suspicious they wanted to check out, according to three industry officials with knowledge of the episode. SpaceX had still images from video that appeared to show an odd shadow, then a white spot on the roof of a nearby building belonging to ULA, a joint venture between Lockheed Martin and Boeing. The SpaceX representative explained to the ULA officials on site that it was trying to run down all possible leads in what was a cordial, not accusatory, encounter, according to the industry sources, who spoke on the condition of anonymity because of the ongoing investigation.
The building, which had been used to refurbish rocket motors known as the SMARF, is just more than a mile away from the launchpad and has a clear line of sight to it. A representative from ULA ultimately denied the SpaceX employee access to the roof and instead called Air Force investigators, who inspected the roof and didn’t find anything connecting it to the rocket explosion, the officials said.
To quote Sherlock Holmes, “When you have eliminated the impossible, whatever remains, however improbable, must be the truth.” In this case, it appears that they have eliminated this impossibility, though it is interesting that SpaceX felt compelled to consider it.
Cash shortage and court problems for Firefly
In the heat of competition: Firefly Space Systems appears to be in serious trouble with a court case going against it and what appears to be a loss of funding.
The legal battle took a turn in Virgin Galactic’s favor earlier this month when the arbitrator in the case (case no. 01-12-0002-2467) made a terminating sanctions ruling determining that Markusic did take Virgin Galactic trade secrets, destroyed evidence, impeded the arbitration process, and transferred Virgin Galactic confidential information to Firefly computers. This ruling makes any further legal action by Virgin Galactic much simpler as they no longer have to prove Markusic took their confidential information.
Things appeared to be going well at Firefly before this ruling, with a high volume of new hiring going on, a $5.5 million Venture class launch services contract with NASA, test firings of their engine, and a successful raise of $19 million in funding. Things may have changed with a statement posted to Twitter today on their @Firefly_Space account stating they have “experienced a setback on funding”.
Freedom and competition produces results fast and of high quality. It also carries risk and allows for failure. It appears that unfortunately Firefly might be illustrating the failure part of the equation.
Airbus signs first customer for its ISS external platform
The competition heats up: Airbus has signed its first commercial customer for an external platform the company will be installing on ISS by the end of 2018.
Neumann Space is an Australian company developing a solar-electric thruster that uses metallic fuels rather than a gas like xenon. The company believes that the thruster will have a higher performance versus conventional electric thrusters and be able to use a wide range of metals as fuels. The company will install an experimental payload on Bartolomeo, a platform that Airbus plans to mount on the exterior of the Columbus module for experiments that require access to the space environment. Paddy Neumann, chief scientist and founder of Neumann Space, said the power requirements for the thruster made flying it on a cubesat or other small satellite impractical. “When we heard about the Bartolomeo platform, we leapt at the chance,” he said in a ceremony at Airbus’ booth at the IAC exhibit hall where the companies signed the agreement.
…Airbus announced the Bartolomeo platform in June as part of what the company called an “end-to-end service” to provide efficient commercial access to the ISS. The company hopes to have the platform installed on the Columbus module by the end of 2018, but officials at the conference said they were still working out launch arrangements and were in discussions with NASA for the spacewalk that will be needed to install the platform outside Columbus.
What is happening here with Airbus and ESA is the same thing that is happening at NASA: a transition from ownership by government to ownership by competing private companies. The positive ramifications of this transition cannot be measured, and have an almost limitless potential for accelerating the exploration of space.
The Pretenders — I’ ll Stand By You
An evening pause: Though the song was made a big hit I think by Carrie Underwood, here we see it performed by the creators.
Hat tip to Matt in AZ, who clued me in to this group.
Libertarian VP candidate praises Hillary Clinton
No wonder all those mainstream newspapers are endorsing them: When asked if if Gary Johnson was more qualified to be president than Hillary Clinton, the Libertarian Party’s candidate for vice president, Bill Weld, expressed almost unqualified enthusiasm for Clinton.
When asked by NBC’s Chuck Todd if Johnson is more qualified for the presidency than Clinton, Weld responded that he is “not sure” if “anybody is more qualified” than Clinton for the position. Weld made the remark after expressing his displeasure with the idea of Donald Trump assuming the office.
It increasingly seems to me that Johnson and Weld’s sole purpose is to provide an option for those mainstream Republican RINO’s who hate Trump for irrational reasons and don’t want to vote for Hillary Clinton. The Libertarian candidates appear to give them a moderate choice (emphasis on the word moderate) that is also acceptable to the Washington crowd. I mean, really, how could anyone show up at a cocktail party in Silver Spring, Maryland after supporting Trump?
Pakistan threatens India with nuclear attack
Pakistan today threatened India with a nuclear attack after India last night conducted a raid on terrorist camps in Pakistan.
The terrorist camps are the suspected source for an attack that killed 17 Indian soldiers two weeks ago.
Black Lives Matter protesters shut down debate at university
Brownshirts: A mob of Black Lives Matter protesters shouted down a planned debate on the movement by the debate club of the University of Michigan, preventing it from happening.
Holding signs with statements such as “my life is not a debate” and “black lives are not up for debate,” as well as chanting “Black Lives Matter,” hundreds of protesters filed into the room where the Michigan Political Union, a non-partisan parliamentary forum that facilitates discussions about contemporary issues, was just beginning its debate Tuesday night.
Michigan Political Union’s President student Joshua Strup had attempted to hold the door into the venue closed as those at the debate heard the crowd of protestors approaching, as the room was already filled to capacity, but to no avail. The protesters burst through and stood along the room’s four walls as well as the walkways between chairs.
Comments and yelling ensued between the protesters and Strup, as well as student moderator Carlos Owens, both of whom attempted to quiet the crowd. But the protesters would not be silenced. They shouted out a series of chants after they entered the room, including “racists hurt race relations,” “black lives are not up for debate, and neither is mine,” and “if you are neutral in situations of injustice, you have chosen the side of the oppressor.” After their shouting spree, they laid on the ground to conduct a die-in demonstration. Thereafter, whenever a debate participant tried to speak, they would shout over them. Much of their comments were laced with profanity.
“You’re irrelevant [because] you’re white,” one protester shouted as student debater Jacob Roodvoets attempted to issue the speech he had prepared.
These bigoted fascists will not only not allow anyone to even discuss publicly the merits of their movement, they make it very clear that they are epitomize bigoted racism, ranking everything by race and preferring blacks over whites.
Office politics delays Russian ISS module
It appears that the reason work has stalled once again on Russia’s long delayed next module for ISS, the Multipurpose Laboratory Module (MLM), is literally because of office politics between government officials.
According to industry sources, the management at the military certification authority apparently ran into worsening relations with the leadership of the space industry.
In other words, there was some spat between the military guy and the space guy, and in revenge the military guy used his authority to stop all work.