The Twitter comment of the day: “More people have applied to live on Mars than have signed up for Obamacare.”
I almost never look at Twitter comments, but this one was too good to pass up.
A collection of new images from Mars by a variety of spacecraft and rovers.
Posted as we approach El Paso and the Texas-New Mexico border.
Making Martian clouds — on Earth.
They’ve recreated Mars-like conditions within a three-story-tall cloud chamber in Germany, adjusting the chamber’s temperature and relative humidity to match conditions on Mars — essentially forming Martian clouds on Earth. While the researchers were able to create clouds at the frigid temperatures typically found on Mars, they discovered that cloud formation in such conditions required adjusting the chamber’s relative humidity to 190 percent — far greater than cloud formation requires on Earth. The finding should help improve conventional models of the Martian atmosphere, many of which assume that Martian clouds require humidity levels similar to those found on Earth.
The required high humidity seems very counter-intuitive, considering Mars’s presently dry environment. I suspect it implies that there are other unknown factors about the Martian atmosphere that the scientists have not yet considered.
NASA and JPL have now stated that the government shutdown will not interfere with their promised support for India’s Mars Orbiter Mission.
Earlier reports had suggested that NASA’s Deep Space Network, used to communicate with planetary probes, would not be available because of the shutdown, and the mission would have to be delayed because of this.
Posted from Columbia, Maryland.
Because India depends on the American Deep Space communications network — mostly unavailable due to the government shutdown — the launch of its first Mars probe, set for October 28, might have to be delayed for two years.
This is unfortunate news indeed. However, if I was India (as well as other countries) I would consider this a call to develop their own deep space network.
NASA has decided to exempt its Mars probe, MAVEN, from the government shutdown, allowing preparations to resume for its November launch.
NASA Headquarters in Washington determined that Maven’s preparations should go ahead on an emergency basis — not because of its scientific objectives, but because of its expected role as a communications relay satellite for the Opportunity and Curiosity rovers on Mars. “Both Mars Reconnaissance Orbiter and Odyssey have been acting as communication relays, but they’ve passed their design lifetime,” Jakosky explained. “Maven carries communication equipment to take over that job as necessary. Getting us launched at this opportunity is a way to preserve that ability to communicate.”
As I’ve said before, as much as I am in favor of launching this kind of science mission, the number of arbitrary decisions relating to this shutdown makes the whole thing look ridiculous. NASA can act to protect its investments on Mars, but the National Park Service is required to interfere with the normal actions of private restaurants here on Earth?
The truth is that these science missions really don’t fall under the intended definition of “essential operations”. The federal bureaucracy, under the direction of the White House, is simply stretching that definition for their own convenience, wherever they like.
Scientists believe they have identified the remains of a supervolcano on Mars.
This volcano would apparently be bigger than Mars’s four giant volcanoes that are still the biggest known in the solar system.
Chicken Little report: With a launch window from November 18 to December7, the government shutdown might delay NASA’s next Mars unmanned probe MAVEN until 2016.
It is absolutely possible that the shutdown could cause MAVEN to miss its launch window. Such is life. The world won’t end, and as much as I am a big supporter of space exploration, I also recognize that there are actually bigger issues than NASA hanging in the balance.
Note that the article above bleeds tears for the poor government officials who might not get paid during the shutdown. Well, the economy has sucked for the past five years, with no signs of improvement and plenty of evidence that Obama and Congress have done a great deal to make things worse, especially with the passage of Obamacare. Maybe we should instead have some sympathy for the people who earn the money to pay for NASA and the government and have been screaming at these politicians to just leave them alone.
Curiosity has found that water and other interesting things permeate the soil of Mars.
When [a soil sample was] heated, the instrument detected the abundance of water [about 2% of the sample] plus significant quantities of carbon dioxide, oxygen and sulfur compounds, according to the researchers. Carbonate materials — compounds that form in the presence of water — were also identified. The experiment confirmed the presence of oxygen- and chlorine-containing compounds — likely chlorates or perchlorates. Originally discovered by NASA’s 2008 Phoenix Mars Lander (and likely detected by NASA’s Viking landers in 1976), perchlorates were found in the soil of high-latitude arctic regions. This indicates that perchlorates occur globally over Mars. Though highly toxic to human biology, some microbes are known to use the oxidizing chemical for energy. This finding intensified the debate over whether hypothetical microbes on Mars could metabolize perchlorates in a similar way.
Perchlorates were proposed as an explanation for the Viking results by scientists who did not believe those results suggested the presence of microbiological life. I find it interesting that now scientists are saying that the perchlorates might actually be evidence of life. Once again, the uncertainty of science rules the day!
Despite data from orbiting probes that say there is methane in Mars’ atmosphere, Curiosity has detected none.
The detection of methane by orbiting satellites in certain regions of Mars was intriguing as it suggested the possibility of Martian microbiological life. Curiosity is not in those regions, but apparently the scientists thought they’d detect evidence of it from a distance. That they did not reduces significantly the possibility of life on Mars.
After two months of travel, Curiosity on Mars is now taking a short break to study the rocks under its wheels.
Curiosity makes a three frame movie of Phobos eclipsing the Sun.
For the first time since arriving on Mars engineers have allowed Curiosity to drive itself.
The 1-ton Curiosity rover used autonomous navigation for the first time on Tuesday (Aug. 27), driving itself onto a patch of ground that its handlers had not vetted in advance. The robot will likely employ this “autonav” capability more and more as it continues the long trek toward the base of Mars’ huge Mount Sharp, NASA officials said.
In autonav mode, Curiosity analyzes photos it takes during a drive to map out a safe route forward. The car-size rover used this ability on Tuesday to find its way across a small depression whose fine-scale features were hidden from Curiosity’s previous location.
Curiosity snaps a spectacular image of Mt Sharp as it begins its journey to the mountain’s base.
The rover has already traveled more than a mile. The mountain however remains about five miles away.
The rover Opportunity has settled into its winter haven on Mars.
The rover’s handlers plan to get Opportunity up onto Solander Point’s north-facing slope before mid-December, NASA officials said. But the golf-cart-size robot won’t hibernate through the winter; rather, it will continue to move about, investigating several different Solander Point outcrops.
Scientists have assembled a movie of one Martian moon eclipsing another, taken from Curiosity.
Video below the fold.
» Read more
Curiosity’s first year on Mars, in video in two minutes.
Scientists have found evidence that at least some of the carved river valleys on Mars were partly the result of snowfall.
In celebration of the 10th anniversary of the launch of Opportunity, Mars Reconnaissance Orbiter took its photograph.
The image was not merely for PR. It also provides the scientists operating Opportunity some good information about the region the rover is exploring, thus helping them plan out its further adventures on the surface of Mars.
Two researchers have concluded that sterilizing spacecraft heading to Mars is largely a waste of money.
As far as Mars is concerned, say Fairén and Schulze-Makuch, such efforts are probably in vain since “Earth life has most likely already been transferred to Mars.” Meteorite impacts have had 3.8 billion years to spread Earth life forms to Mars. Several Earth spacecraft have visited Mars without undergoing the sterilization procedures now in place. If organisms transferred to Mars over the eons failed to survive, modern organisms would likely face the same fate. If they did survive, say Fairén and Schulze-Makuch, “it is too late to protect Mars from terrestrial life, and we can safely relax the planetary protection policies.”
They also note that NASA’s “Office of Planetary Protection is like an interplanetary Environmental Protection Agency” and that its “‘detailed and expensive’ efforts to keep Earth microorganisms off Mars are making missions to search for life on the red planet ‘unviable.’”
