Go to sleep for science and space exploration
Go to sleep for science and space exploration.
Tag: spaceflight
Hayabusa captured asteroid dust
The first asteroid sample return! Japanese scientists announced today that their probe Hayabusa did capture asteroid dust in its visit to the asteroid Itokawa.
Chinese female astronaut identified
Chinese female astronaut identified.
Shades of foam and failed o-rings?
A fourth crack has been found on Discovery’s external tank. How this will affect Discovery’s November 30 launch remains unknown. There will a briefing on Monday to discuss the status of the schedule. This quote however gives me the willies:
External tank crack repairs are not unusual. Some 29 stringer cracks were found in 18 previous tanks, according to an official familiar with their history. Four have now been found in Discovery’s tank, ET-137, and three were found in a tank scheduled for use by the shuttle Atlantis next summer, ET-138. Doublers were used in 23 repairs.
There is a saying that we always fight the last war. After the Challenger accident NASA made great effort to prevent another o-ring failure in the solid rocket boosters, and ignored the foam falling from the external tank. After the Columbia accident, NASA then made great effort to prevent another piece of foam from hitting an orbiter.
Unfortunately, it appears that NASA may now be ignoring this crack problem. Even though they have been able to repair past cracks, for this many cracks to occur this often should cause alarm bells to ring throughout the agency, forcing a look at the problem in toto. Instead, it appears management has been making catch-as-catch-can repairs.
What makes this situation even more difficult is the factory that makes the external tanks has shut down. No new tanks are available. Thus, there are not many options for flying these last few shuttle missions except by using the already existing tanks, and repairing them as needed.
Like I said, this is beginning to give me the willies.
Russians complete spacewalk
Except for the failure to install a video camers, two Russian astronauts successfully completed a six hour spacewalk on ISS today, doing a variety of construction tasks on the station’s exterior.
Video from Chang’e 2
Videos from the Chinese lunar probe, Chang’e 2.
Breaking the Ice in Antarctica
The first tests in Antarctica of a drill designed to drill cores on Mars.
The coming train wreck for Commercial Human Spaceflight
This post by retired NASA engineer Wayne Hale explains why it probably is a good idea if Congress cuts the subsidies for new commercial space: The coming train wreck for commercial human spaceflight. This is the key quote, where Hale describes the regulations NASA is requiring these new companies to meet:
The document runs a mind-numbing 260 pages of densely spaced requirements. Most disappointing, on pages 7 to 11 is a table of 74 additional requirements documents which must be followed, in whole or in part. Taken all together, there are thousands of requirement statements referenced in this document. And for every one NASA will require a potential commercial space flight provider to document, prove, and verify with massive amounts of paperwork and/or electronic forms.
Third crack found on Discovery’s external tank shell
A third crack has been found on Discovery’s external tank shell.
The comet is carbonated
The comet is carbonated!
Is the Mars rover Spirit dead?
Is Spirit, the Mars rover, finally dead?
The private race to build space stations
The cold war is back! Companies in the U.S. and Russia are in a race to build the first private space stations.