Month: June 2011

Cool images from Mars and Mercury

11:57 am

Here are two image releases of interest, one from Mars and one from Mercury.

Pavonis Mons pit

First the Mars image. This close-up image of a pit, requested by a seventh grade Mars student team at Evergreen Middle School in Cottonwood, California, shows more evidence of underground voids on Mars. The pit is located on the flank of one of Mars’ larger volcanoes, and suggests that there is a lava tube below it. At some point the roof over the tube at this point became unstable and collapsed, producing the surface pit.

A close-up image of the shadowed part of the pit with the exposure turned way up unfortunately shows that there is no skylight in the pit into the lava tube.

Next, the Mercury image, from Messenger.
» Read more

Leave a comment

How the recently dissolved California Space Authority wasted millions of dollars in federal earmarks and grants

9:27 am

How the recently dissolved California Space Authority wasted millions of dollars in federal earmarks and grants.

Sadly, this story is typical of many quasi-public/private authorities, most of which have nothing to do with the aerospace industry. There is a lot of one hand washing the other, using money the federal government nonchalantly gives away as if it is water.

One comment

Hadrian built his country estate with the buildings aligned with the sun

9:18 am

The Roman emperor Hadrian built his country estate with the buildings aligned with the sun.

For centuries, scholars have thought that the more than 30 buildings at Hadrian’s palatial country estate were oriented more or less randomly. But De Franceschini says that during the summer solstice, blades of light pierce two of the villa’s buildings.

In one, the Roccabruna, light from the summer solstice enters through a wedge-shaped slot above the door and illuminates a niche on the opposite side of the interior (see image). And in a temple of the Accademia building, De Franceschini has found that sunlight passes through a series of doors during both the winter and summer solstices.

Leave a comment

Unmanned sail prototype prepares for launch

11:51 pm

A prototype of an unmanned sailing ship will begin a test voyage this fall.

Although Harbor Wing will operate without a captain and crew by sailing on a pre-programmed course, “the man is always in the loop,” Ott said. An operator, seated at a computer that could be hundreds of miles away, can control the craft with keystrokes that relay commands via satellite. The transmission gap, from order to receipt, is only 18 seconds, which “on the open ocean is not much,” he said, “so you have very close control.”

One comment

NASA about to decide on its shuttle heavy-lift replacement

5:56 pm

NASA is about to decide on its shuttle heavy-lift replacement, and it looks like it will be almost entirely shuttle-derived.

As I have said previously, this rocket will almost certainly never fly. NASA has to start over after spending billions and years developing Constellation, and is being given less money and time to do it.

And even if I am wrong and this rocket does fly, I bet it will do only one flight and then be retired as too costly.

2 comments

Sheila Jackson Lee Likens Islamic Radicals to ‘Christian Militants’ in U.S.

11:28 am

An idiot speaks: Congresswoman Sheila Jackson Lee (D-Texas) yesterday equated Islamic terrorists with “Christian militants” in the United States.

Since 9/11 Islamic terrorists have carried out more than 17,000 attacks, killing tens of thousands. In that same time, you could count on one hand the number of attacks by “Christian militants,” if that many. For Representative Lee, it seems it is hard for her to tell the difference.

4 comments

National Speleological Society responds to the demand that all caves be closed to protect bats

12:20 am

The National Speleological Society has responded in strong opposition [pdf] to the demand by the Center for Biological Diversity that all caves on public land be closed to protect bats.

Calling for blanket cave closures across the U.S. is unnecessary, unenforceable, and counterproductive. While cave closures on some federal lands have been implemented, particularly in the eastern U. S., there is no evidence that this action has done anything to contain [white nose syndrome] (WNS). Most people working on WNS understand that bat to bat transmission is overwhelmingly the primary method of transmission, and administrative closing of caves and mines does nothing to prevent that.

Leave a comment

ESA controllers buy time to solve problems on comet probe Rosetta

11:03 pm

This ain’t good. One of the reasons ESA controllers recently put the comet probe Rosetta into hibernation for two and a half years was in order to buy time to solve a serious technical problem.

Mission managers said the hibernation will permit Rosetta to rest its four reaction wheels, two of which have shown signs of degradation. The satellite needs three to function, and one of the two problem wheels will be used only as a spare when the satellite is awakened in January 2014 in preparation for its approach to a comet.

Leave a comment
1 … 3 4 5 6 7 … 10