the problems of human waste management in space
Sometimes going is hard: The engineering challenge of human waste management in space.
Sometimes going is hard: The engineering challenge of human waste management in space.
Tag: engineering
the problems of human waste management in space
Why a hypersonic test vehicle disappeared last April
DARPA has completed its investigation on why a hypersonic test vehicle (HTV), launched on April 22, disappeared about 9 minutes into its flight. Key quote: “The HTV wobbled too much. Rather than risking an out-of-control flight, the bot self-destructed.”
DARPA has completed its investigation on why a hypersonic test vehicle (HTV), launched on April 22, disappeared about 9 minutes into its flight. Key quote: “The HTV wobbled too much. Rather than risking an out-of-control flight, the bot self-destructed.”
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.
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.
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.
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.
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 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.
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.
Is the Mars rover Spirit dead?
Is Spirit, the Mars rover, finally 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.
The cold war is back! Companies in the U.S. and Russia are in a race to build the first private space stations.
Vase earns record auction price
Why a yard sale to get rid of your junk is not always a good idea: An old vase, ignored by a surburban family for years, fetched them a record $83 million in an auction today.
Why a yard sale to get rid of your junk is not always a good idea: An old vase, ignored by a surburban family for years, fetched them a record $83 million in an auction today.
Leaking vent line attachment disassembled, apparent seal problem found
Engineers have apparently found the cause of the leak in the hydrogen fuel line to Discovery’s external tank.
Engineers have apparently found the cause of the leak in the hydrogen fuel line to Discovery’s external tank.
Orbital Sciences tests the first stage engine of its Taurus II rocket
Orbital Sciences today successfully completed the first test of the first stage engine for its Taurus II rocket, the rocket the company plans to use in sending cargo to ISS.
Orbital Sciences today successfully completed the first test of the first stage engine for its Taurus II rocket, the rocket the company plans to use in sending cargo to ISS.
More cracks found on Discovery’s external tank
Bad news for that November 30 shuttle launch date: Two cracks have been found on the aluminum body of Discovery’s external tank.
Bad news for that November 30 shuttle launch date: Two cracks have been found on the aluminum body of Discovery’s external tank.
Highest point on the Moon
Cassini to be back in operation by November 24
Engineers expect to get Cassini, which went into safe mode on November 2, back in operation by next week.
Engineers expect to get Cassini, which went into safe mode on November 2, back in operation by next week.
The state of the Iranian space program
The up and down state of the Iranian space program.
The up and down state of the Iranian space program.
Mystery missile an optical illusion?
At least one expert claims that the mystery missile launch off the California coast on was merely an optical illusion. Key quote:
John Pike of the security analyst group globalsecurity.org said the video shot by a news helicopter owned by KCBS is an optical illusion. Pike said the video is of an airplane heading toward the camera and the contrail is illuminated by the setting sun. He said the object can’t be a rocket because it appeared to alter its course.
At least one expert claims that the mystery missile launch off the California coast on was merely an optical illusion. Key quote:
John Pike of the security analyst group globalsecurity.org said the video shot by a news helicopter owned by KCBS is an optical illusion. Pike said the video is of an airplane heading toward the camera and the contrail is illuminated by the setting sun. He said the object can’t be a rocket because it appeared to alter its course.
Mystery rocket launch off of California coast
Mystery rocket launch yesterday off of the California coast.
Mystery rocket launch yesterday off of the California coast.
Crack in fuel tank foam
In addition to the hydrogen leak on Discovery, NASA is now dealing with a crack in the foam insulation on the shuttle’s external tank.
In addition to the hydrogen leak on Discovery, NASA is now dealing with a crack in the foam insulation on the shuttle’s external tank.
SpaceX Falcon 9 launch delayed until December 7
The second test launch of the Falcon 9, with the first flight of the Dragon capsule, has been postponed again. It is now set for December 7.
The second test launch of the Falcon 9, with the first flight of the Dragon capsule, has been postponed again. It is now set for December 7.
Cassini goes into safe mode
Cassini went into safe mode on Tuesday, November 2nd. At the moment engineers expect it to take at least another week to get the spacecraft back to normal.
Cassini went into safe mode on Tuesday, November 2nd. At the moment engineers expect it to take at least another week to get the spacecraft back to normal.
Discovery’s launch is postponed until no sooner than November 30
Discovery’s launch is now officially postponed until no sooner than November 30.
Discovery’s launch is now officially postponed until no sooner than November 30.
The first images of Deep Impact’s flyby of Comet Hartley 2
Here are the first images of Deep Impact’s flyby of Comet Hartley 2. The first is a montage, the sequence in time going clockwise. The second is a close-up of the second image.
The feature that I find most intriguing is the narrow smooth waist of the comet’s dogbone shape. The whole thing looks almost like a piece of taffy that’s being pulled apart.
Burt Rutan retiring
It isn’t the first time he’s said it, but Burt Rutan, designer of SpaceShipOne, says he is retiring from Scaled Composites.
It isn’t the first time he’s said it, but Burt Rutan, designer of SpaceShipOne, says he is retiring from Scaled Composites.
Discovery launch scrubbed due to hydrogen leak
Discovery’s launch is scrubbed again, this time due to another hydrogen leak. Next possible launch date is Monday, which means it is possible the launch will be delayed until early December.
Discovery’s launch is scrubbed again, this time due to another hydrogen leak. Next possible launch date is Monday, which means it is possible the launch will be delayed until early December.
An Early Warning System for Asteroid Impact
In a paper posted tonight on the Los Alamos astro-ph website, an astronomer is proposing an early warning system for asteroid impact. Key quote from the abstract:
This system, dubbed “Asteroid Terrestrial-impact Last Alert System” (ATLAS), comprises two observatories separated by about 100km that simultaneously scan the visible sky twice a night, and can be implemented immediately for relatively low cost. The sensitivity of ATLAS permits detection of 140m asteroids (100 Mton impact energy) three weeks before impact, and 50m asteroids a week before arrival. An ATLAS alarm, augmented by other observations, should result in a determination of impact location and time that is accurate to a few kilometers and a few seconds.
In a paper posted tonight on the Los Alamos astro-ph website, an astronomer is proposing an early warning system for asteroid impact. Key quote from the abstract:
This system, dubbed “Asteroid Terrestrial-impact Last Alert System” (ATLAS), comprises two observatories separated by about 100km that simultaneously scan the visible sky twice a night, and can be implemented immediately for relatively low cost. The sensitivity of ATLAS permits detection of 140m asteroids (100 Mton impact energy) three weeks before impact, and 50m asteroids a week before arrival. An ATLAS alarm, augmented by other observations, should result in a determination of impact location and time that is accurate to a few kilometers and a few seconds.
More info on Deep Impact flyby of Comet Hartley 2
First close-up photos of Comet Hartley 2 reveal a space peanut.
First close-up photos of Comet Hartley 2 reveal a space peanut.
Watching the Deep Impact flyby of Hartley 2
Watch the Deep Impact flyby of Hartley 2 this instant (11:06 AM eastern)! The images are incredible. Update: The fly-by is over, but the live stream is still available (as of 11:30 am Eastern), showing some of the images taken. The comet itself is a peanut-shaped object about two miles long, with a jet of water coming out one end.
Watch the Deep Impact flyby of Hartley 2 this instant (11:06 AM eastern)! The images are incredible. Update: The fly-by is over, but the live stream is still available (as of 11:30 am Eastern), showing some of the images taken. The comet itself is a peanut-shaped object about two miles long, with a jet of water coming out one end.