Bob Dylan – Don’t Think Twice It’s Alright
An evening pause: Performed live 1965.
Hat tip Jim Mallamace.
Month: June 2018
More Earthlike exoplanets!
Astronomers using data from Kepler have discovered two stars, both with multiple orbiting Earth-sized planets. One has three planets all almost exactly the mass of Earth.
The first exoplanetary system is located in the star K2-239, characterized by these researchers as a red dwarf type M3V from observations made with the Gran Telescopio Canarias (GTC), at the Roque de los Muchachos Observatory (Garafía, La Palma). It is located in the constellation of the Sextant at 50 parsecs from the Sun (at about 160 light years). It has a compact system of at least three rocky planets of similar size to the Earth (1.1, 1.0 and 1.1 Earth radii) that orbit the star every 5.2, 7.8 and 10.1 days, respectively.
The other red dwarf star called K2-240 has two super-Earth-like planets about twice the size of our planet. Although the atmospheric temperature of red dwarf stars, around which these planets revolve, is 3,450 and 3,800 K respectively, almost half the temperature of our Sun, these researchers estimate that all planets discovered will have temperatures superficial tens of degrees higher than those of the planet Earth due to the strong radiation they receive in these close orbits to their stars.
Knowing more about the surface environments of these very Earthlike exoplanets, as hostile as they might be to life, would teach us a great deal about our own planet and its birth and evolution.
Curiosity finds methane fluctuates seasonally in Gale Crater
In its second significant science release yesterday (the first relating to the discovery of organics), the Curiosity science team revealed that they have found over almost three Martian years the amount of methane in the atmosphere appears to fluctuate seasonally. The graph on the right illustrates this change.
[The data] show methane rises from just above 0.2ppb in the northern hemisphere winter to a fraction over 0.6ppb in the summer. The team’s best explanation is that methane is seeping up from underground, perhaps from stored ices, and is then being released when surface soils are warmed.
The team cannot positively identify the origin of the methane, but the researchers think they can close down one particular mechanism for its production. This involves sunlight breaking up carbon-rich (organic) molecules that have fallen to the planet’s surface in meteorites.
The variation in ultraviolet light over the course of the seasons is not big enough to drive the scale of the change seen in the methane concentration, says Dr Webster. “We know the intensity of the Sun and this mechanism should produce only a 20% increase in methane during the summer, but we’re seeing it increase by a factor of three,” he explained.
The change could be caused by either a chemical or a biological process. At this time there is no way to determine which.
Germany to do partial gravity experiments using Zero-G airplane
In what might be the first human experiments in partial gravity, Germany has hired the Zero-G airplane for a series of flights testing how humans react in such conditions.
In the Partial G Campaign, the pilots fly three special parabolic shapes. So instead of zero-g or microgravity, one quarter, half and three quarters of Earth’s gravity will still be present. Passengers on board will therefore experience one quarter, half or three quarters of their own body weight – depending on the trajectory,” explains Stang.
The goal of these flights is to see what effect partial gravity has on human muscle control.
For humans to be able to move around and interact with their environment, they require finely tuned muscle movements, to walk around or ensure a secure footing, for instance. Under partial gravity, in particular, they must be able to effectively control their muscles via their neural pathways. If we are unable to do so, the risk of stumbling is dramatically increased. This applies to both humans on Earth and astronauts in space. However, partial gravity conditions appear to influence this neuromuscular control in challenging situations, increasing the astronaut’s risk of stumbling. Researchers at the University of Freiburg are investigating why this is so. The results are intended to reduce the risk to astronaut safety during missions to other planets, thereby resolving a fundamental safety issue in human physiological space exploration.
This is better than nothing, but it seems to me to be the least important thing to study in partial gravity. The Apollo astronauts clearly demonstrated that humans can adapt their muscle movements to partial gravity. What we must instead learn is whether partial gravity will eliminate bone loss, loss of cardio-vascular conditioning, spinal changes, balance problems, and the vision damage, all of which have been found to occur in weighlessness.
At the same time, it is probably impossible to study any of these latter issues during a short parabolic vomit comet flight. The Germans are doing what they can. Unfortunately, they might be the only ones doing anything in this area.
House passes tiny $15 billion budget cut
The corruption runs deep: House today passed, by the tiniest of margins, a minuscule $15 billion budget cut designed to make believe they are being fiscally responsible after their passage of a two year budget deal that added $300 billion of additional spending to the already bankrupt federal budget.
They will break their arms patting themselves on the back about this bill, even though they also know there is almost no chance this bill will make it through the Senate.
In other words, this is failure theater. After passing the bloated budget deal the Republicans in Congress went home to discover that the voters meant it when they said they wanted the budget slashed. They are now trying to manufacture a lie that says they are trying to cut the budget. They are lying however. They have no intention of trimming the budget. In this matter they are as corrupt as the Democrats.
And they wonder why we got Trump.
Former staffer of Senate intelligence committee indicted for leaks
The corruption runs deep: The retired director of security for the Senate intelligence committee was arrested today after being indicted for leaking committee information to the press and then lying about it.
It appears he was having an affair with a reporter and feeding her information.
June 6, 2018 Zimmerman/Batchelor podcast
Embedded below the fold in two parts. In the first part I talk at length about the intriguing Martian pit I highlighted earlier in the week.
» Read more
How an accelerometer works
An evening pause: A little dense for non-engineers, but just clear enough to be educational for all.
Hat tip Edward Thelen.
As always, I am in need of suggestions for evening pauses. If you’ve seen something you think will fit, place a comment here, in this post, but don’t post a link to your suggestions. I will contact you so that you can send it to me direct and I can then schedule it.
New texts from former FBI officials reveal contempt for Congress and the law
Newly released and unredacted texts from former FBI officials Peter Strzok and Lisa Page not only reveal an effort to stonewall Congress from doing its Constitutionally-mandated oversight, they reveal an utter contempt for the law.
The article focuses on their contempt of Congress, but it really reveals that these two FBI agents, who now appear to be quite typical of much of the FBI’s upper management, were aggressively promoting a cover-up of illegal FBI actions and defying Congress in the process.
About a week after Comey’s press conference, Strzok wrote to Page that he was “Worried about work.” He was worried about “How much we decide to release, the prospect of second guessing.” It’s one thing if the second-guessing came from DoJ’s inspector general, but Strzok wasn’t about to be overseen by lawmakers: “The IG doing that bugs me;” Strzok texted, “Congress doing so infuriates me.”
He was doubly worried because, that day, Chaffetz and House Judiciary Committee Chairman Bob Goodlatte had sent a criminal referral to the U.S. Attorney for the District of Columbia asking that Hillary Clinton be investigated, and perhaps prosecuted, for perjury. For Strzok, the referral was yet another reason to withhold information requested by Congress: “You read the referral yet?” Strzok asks Page. “We really want to drop the LHM [a summary of an investigation called a Letterhead Memorandum] and 302s [FBI interview notes] into that environment?”
Page called the requests from the Hill, “insulting” and Strzok declared “I just have no faith in Congress to respect our investigative information. The LHM and no more. Not even senior people’s 302, unless what we’d release via foia [the Freedom of Information Act].”
Even when the FBI was cornered into making documents available, they did their best to hobble efforts to read them. Here’s Peter Strzok texting Lisa Page on August 16, 2016, the day the FBI finally turned over a single heavily redacted copy of the 302 notes of Hillary Clinton’s FBI interview: “I’m strongly opposed to making any more copies for Congress. We limited on purpose, After careful consideration. If they let any particular committee get the copy, tough. Let them sort it out.” [emphasis mine]
Peter Strzok very eloquently sums up their attitude in one later text: “F them.”
Contempt for Congress is perfectly reasonable. I actually agree with them here. Refusing to obey the orders of elected officials, however, is an abuse of power, is illegal, and at a minimum should have gotten them fired, immediately. Instead, the FBI leadership (Comey, McCabe, Rosenstein, etc) worked with them to defy Congress.
As I said yesterday, these people should also go to jail. They not only broke their oaths to defend and obey the Constitution, they participated in a criminal cover-up, in this case acting to protect the Democratic Party’s candidate for President from criminal prosecution.
Curiosity finds evidence of complex carbon molecules
In a study released today, the Curiosity science team announced that earlier drill samples revealed evidence of complex organic carbon molecules, the possible remains of past life.
To unlock organic molecules from the samples, the oven baked them to temperatures of between 600°C and 860°C—the range where a known contaminant disappeared—and fed the resulting fumes to a mass spectrometer, which can identify molecules by weight. The team picked up a welter of closely related organic signals reflecting dozens or hundreds of types of small carbon molecules, probably short rings and strands called aromatics and aliphatics, respectively. Only a few of the organic molecules, sulfur-bearing carbon rings called thiophenes, were abundant enough to be detected directly, Eigenbrode says.
The mass patterns looked like those generated on Earth by kerogen, a goopy fossil fuel building block that is found in rocks such as oil shale—a result the team tested by baking and breaking organic molecules in identical instruments on Earth, at Goddard. Kerogen is sometimes found with sulfur, which helps preserve it across billions of years; the Curiosity scientists think the sulfur compounds in their samples also explain the longevity of the Mars compounds.
Earth’s kerogen was formed when geologic forces compressed the ancient remains of algae and similar critters. It’s impossible to say whether ancient life explains the martian organics, however. Carbon-rich meteorites contain kerogenlike compounds, and constantly rain down on Mars. Or reactions driven by Mars’s ancient volcanoes could have formed the compounds from primordial carbon dioxide. Monica Grady, a planetary scientist at The Open University in Milton Keynes, U.K., believes the compounds somehow formed on Mars because she thinks it’s highly unlikely that the rover dug into a site where an ancient meteorite fell. She also notes that the signal was found at the base of an ancient lake, a potential catchment for life’s remains. “I suspect it’s geological. I hope it’s biological,” she says.
It must be emphasized once again that they have not found evidence of past life. What they have found are the types of molecules that are often left behind by life, but can also form without the presence of life.
This result, from past drillholes in the Murray Formation, explains however why Curiosity headed back downhill to do its most recent drill test.
Curiosity has one last tool to help the team find out: nine small cups containing a solvent that frees organic compounds bonded in rock, eliminating the need to break them apart—and potentially destroy them—at high temperatures. In December 2016, rover scientists were finally prepared to use one of the cups, but just then the mechanism to extend the rover’s drill stopped working reliably. The rover began exploring an iron-rich ridge, leaving the mudstone behind. In April, after engineers found a way to fix the drill problem, the team made the rare call to go backward, driving back down the ridge to the mudstone to drill its first sample in a year and half. If the oven and mass spectrometer reveal signs of organics in the sample, the team is likely to use a cup. “It’s getting so close I can taste it,” says Ashwin Vasavada, Curiosity’s project scientist at the Jet Propulsion Laboratory in Pasadena, California.
The newest drillhole sample has now entered the mass spectrometer. Stay tuned!
Movie of Juno’s thirteenth fly-by of Jupiter
Cool image time. Mathematician and software programmer Gerald Eichstädt has released another movie using images from Juno’s thirteenth close fly-by of Jupiter.
I have embedded the movie below the fold. As he notes,
The movie covers two hours of this flyby in 125-fold time lapse, the time from 2018-05-24T04:41:00.000 to 2018-05-24T06:41:00.000. It is based on 27 of the JunoCam images taken during the flyby, and on spacecraft trajectory data provided via SPICE kernel files.
The view begins by looking down at the northern hemisphere, and gets to within 2,200 miles of the giant planet’s cloud tops.
Rigged poll claims Americans want NASA to do climate research
A new Pew Research Center poll, that is getting lots of play in the press today and claims that Americans want climate research to be NASA’s number one purpose, appears very rigged to me.
First their main conclusion:
NASA oversees a diverse portfolio of space-related missions, from sending robotic probes to explore distant planets to launching satellites that study Earth’s atmosphere and oceans.
When asked to rate the importance of nine of these missions, majorities of Americans say a top priority for NASA should be monitoring key parts of the Earth’s climate system (63%) or monitoring asteroids and other objects that could potentially collide with the Earth (62%).
Slightly fewer than half of Americans (47%) believe that conducting basic scientific research to increase knowledge and understanding of space should be a top priority, with 40% saying such research is an important but lower priority.
…Missions for human astronauts to explore Mars and return to the moon are among NASA’s most high-profile programs. The Trump administration has expressed strong support for these initiatives, saying that exploring the solar system should be NASA’s core mission, beginning with a return of astronauts to the moon.
However, compared with other NASA programs, fewer Americans say such space exploration should be a top priority. Just 18% and 13%, respectively, say that sending astronauts to Mars or back to the moon should be a top priority; 37% and 44%, respectively, express the view that these missions are not too important or that NASA shouldn’t undertake these missions. [emphasis mine]
You can download the full report here [pdf].
While it is very possible that the high numbers for NASA climate research and low numbers for a NASA mission to the Moon or Mars reflect a growing skepticism about NASA’s ability to do space work, the poll itself simply isn’t trustworthy. Buried deep in Pew’s press announcement (three webpages down) was a graph that showed that, while the sample population surveyed was distributed reasonably in most ways, the numbers Republicans and Democrats polled was very skewed, 981 Republicans to 1,483 Democrats.
This is absurd. Every recent election has shown that the nation is very evenly split between these two parties. If anything, the results of the 2010, 2012, 2014, and 2016 elections would suggest there are more Republicans than Democrats. To favor Democrats by one third is simply dishonest and inaccurate. Even if they claim that they are merely polling Americans, not voters, the split shouldn’t be weighed that much in favor of Democrats.
Moreover, the poll shows how this skew warps the results, as it also admits that 78 percent of the Democrats polled love NASA’s climate research, while only 44 percent of Republicans do. The poll did find that both Democrats and Republicans had no interest in NASA’s deep space exploration plans, but once again, the poll did not ask why. I strongly suspect that NASA’s inability to get SLS launched explains this. No one believes the agency will ever do it.
With climate research the agency has an easier job, and has done better, but even here many Republicans have strong doubts, and would rather give the job to someone else.
It seems to me that the time has come to completely ignore political polling operations like Pew. They really have only one goal, and that is to push the Democratic Party’s political agenda.