Category: Behind The Black

The strange hollows on the mountain tops of Mercury

10:11 am

hollows on Mercury

Another spectacular planetary science image, this time from Messenger orbiting Mercury. This close-up image of the hollows of Mercury only illustrates their mystery. The insert shows the context of the close-up image. These irregular sinks are here found on the mountain top ridge of an inner crater rim. Also, some but not all of the hollows have bright interiors.

Scientists have proposed that some form of impact melt process caused these hollows. At impact, the ground literally rippled like water when you toss a stone into a pool. Here, however, the molten ripples quickly froze, creating the inner and outer crater rim rings. To my untrained eye, the hollows look like collapse features where the surface hardened first, then collapsed when the molten inner material drained away as it became solid.

Why some hollows are bright, however, is not yet understood.

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The red cliffs of Mars

9:44 am

Red cliffs on Mars

Last week the Mars Reconnaissance Orbiter team released this beautiful image of what they call “layered yardangs” on Mars.

What creates these sharp ridges? This layered terrain has been sculpted by the wind. The aligned ridges are called yardangs, which are formed in areas where the dominant erosional force is the wind. Yardangs are also found on Earth, usually in very dry areas.

What I see are majestic red cliffs rising out of a aqua-colored sand desert. What a place to visit!

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Test flights of SpaceShipTwo resume

9:22 am

After a summer break, the flight tests of SpaceShipTwo have resumed. Thursday’s test appeared to a bit more exciting that previous flights:

Test card called for releasing the Spaceship from WhiteKnightTwo and immediately entering a rapid descent. Upon release, the Spaceship experienced a downward pitch rate that caused a stall of the tails. The crew followed procedure, selecting the feather mode to revert to a benign condition. The crew then defeathered and had a nominal return to base. Great flying by the team and good demo of feather system.

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Scientist proposes that the superluminal neutrinos are merely measuring the true speed of light

9:15 am

On Thursday physicist Susan Gardner of the University of Kentucky proposed in a preprint on the Los Alamos astro-ph website that the neutrinos measured at CERN that appeared to be going faster than light were merely giving us a much more accurate measure of the speed of light.

This is only one of a plethora of papers published this last week on astro-ph discussing and attacking the CERN neutrino results. I expect the scientists will solve this mystery before too long.

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Arctic ozone loss at record level

8:03 pm

The ozone levels over the Arctic this past year were the lowest on record, caused by unusually cold temperatures.

No records for low temperature were set this year, but the air remained at its coldest for an unusually long period of time, and covered an unusually large area. In addition, the polar vortex was stronger than usual. Here, winds circulate around the edge of the Arctic region, somewhat isolating it from the main world weather systems.

“Why [all this] occurred will take years of detailed study,” said Dr. [Michelle] Santee [from NASA’s Jet Propulsion Laboratory]. “It was continuously cold from December through April, and that has never happened before in the Arctic in the instrumental record.”

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Santa Catalina Mountains – hike to Romero Pools

8:01 pm

An evening pause: A hike to Romero Pools in the Santa Catalina Mountains just outside Tucson, Arizona. The hiker in the video calls this one of the toughest hikes he’s ever done, but it is only 5.6 miles round trip, with only a thousand foot elevation gain. Compared to most of the other Santa Catalina hikes, which routinely require elevation gains of 3000 to 5000 feet, this one is easy.

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Five myths about China’s space effort

9:04 am

Five myths about China’s space effort. Key recommendation:

Recognize the significance of space as a field of competition. Beijing is not engaged in a space race with Washington. But China is engaged in a great power competition with the U.S. in which space is one arena. American decision makers should come to terms with this duality. In this regard, the Chinese are unlikely to be manipulated by American proposals on “codes of conduct” or meetings with the head of NASA. As long as Beijing and Washington are in competition, space will be one of the major venues.

And competition is not a bad thing. It is going to be the fuel that gets the human race into space.

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Obama administration considering eliminating the ATF

7:51 am

Whoa! The Obama administration is considering eliminating the ATF in connection with the guns-to-Mexico scandal.

After a town hall meeting about Operation Fast and Furious in Tucson, Ariz. on Monday, ATF Whistleblower Vince Cefalu, who has been key in exposing details about Operation Fast and Furious, confirmed the elimination of ATF has been circulating as a serious idea for sometime now and that a white paper outlining the plan does exist.
[snip]
[However,] ATF field agents weren’t the problem with Operation Fast and Furious, high ranking officials within ATF and the Department of Justice were and still are. DOJ would eliminate ATF only to take the heat off of the Obama Administration. By eliminating the bureau, it makes it seem like DOJ is taking Operation Fast and Furious so seriously, they decided to “clear out the corruption, clean house,” however, it would only be a distraction away from the people at the top of the investigation. In fact, evidence shows the DOJ has been stonewalling the Oversight Committee investigation into the operation to protect Obama political appointees.

If true, this story suggests that there are many very high level officials in the Obama administration that are very vulnerable to prosecution over Operation Fast and Furious, and they are scrambling to find a way to protect themselves anyway possible.

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Mars atmosphere has more water vapor than predicted

6:46 pm

Data from Mars Express has found that the Martian upper atmosphere has far more water vapor than predicted.

“The vertical distribution of water vapour is a key factor in the study of Mars’ hydrological cycle, and the old paradigm that it is mainly controlled by saturation physics now needs to be revised,” said Luca Maltagliati [of the Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) in Guyancourt, France]. “Our finding has major implications for understanding the planet’s global climate and the transport of water from one hemisphere to the other.”

“The data suggest that much more water vapour is being carried high enough in the atmosphere to be affected by photodissociation,” added Franck Montmessin, also from LATMOS, who is the Principal Investigator for SPICAM and a co-author of the paper. “Solar radiation can split the water molecules into oxygen and hydrogen atoms, which can then escape into space. This has implications for the rate at which water has been lost from the planet and for the long-term evolution of the Martian surface and atmosphere.”

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Scientists push for monitoring network to collect environmental and socioeconomic data from around the world

5:52 pm

What could go wrong? Scientists push for a monitoring network to collect environmental and socioeconomic data from around the world.

Sandy Andelman, an ecologist with Conservation International in Arlington, Virginia, discussed her work setting up a pilot project that began two years ago in southern Tanzania. In addition to basic environmental data about soils, nutrients and land cover, the project tracks agricultural practices. It also incorporates data about income, health and education that is maintained by the government. Andelman says that all the data she collects can be broken down to the level of individual households, and that initial results from the project have already prompted the Tanzanian government to adjust the way it zones agricultural land in the area. [emphasis mine]

Lord help the farmers whose lives will be tracked by this network.

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Reality always wins

12:19 pm

Elon Musk’s talk yesterday at the National Press Club revealed several interesting things, about SpaceX’s rocket effort, about the state of the American commercial space industry, and about Elon Musk himself.

First, the company’s rocket design effort. Musk centered his talk on SpaceX’s new effort to make its Falcon 9 rocket completely reusable. Though he produced little specific details, and the moderator at the event asked no questions about it, it seems the engineering centers around these three concepts:
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House proposes a budget increase for NIH

6:35 pm

The Republican-controlled House has proposed a budget for National Institutes of Health (NIH) that is one billion more than last year’s budget, an increase from $30.7 to $31.7 billion.

What evil budget-cutters these Republicans are! Their mean-spirited budget increase has the nerve to reduce Obama’s budget request by about $120 million, equivalent to a whopping one third of one percent!

This is all shameful. For context, in 2008 NIH’s budget was $29.2 billion. Considering the state of the budget it seems unconscionable for the House to agree to any increase over $30.7 billion. In truth, it is perfectly reasonable to reduce NIH’S budget back to its 2008 number.

Too bad our present Congress, both Democratic and Republican, isn’t reasonable.

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NASA has identified ninety percent of the largest near-Earth asteroids

6:19 pm

Data from the infrared telescope WISE has now identified ninety percent of the largest near-Earth asteroids.

NASA researchers also downgraded their estimate of the number of medium-sized asteroids, saying there are 44 percent fewer than previously believed. The downside is that scientists have yet to find many of these mid-sized asteroids, which could destroy a metropolitan city.

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