Tag: engineering

The seven ton climate satellite, UARS, is set to fall to earth sometime in the next month

10:47 pm

A defunct seven-ton NASA climate satellite is about to fall to Earth.

The Upper Atmosphere Research Satellite, or UARS, is expected to come down in late September or early October, the space agency said today in an advisory. “Although the spacecraft will break into pieces during re-entry, not all of it will burn up in the atmosphere,” NASA said.

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Virgin Galactic hosts an industry day at New Mexico spaceport

10:43 pm

Virgin Galactic announced today that it will co-host an industry day at Spaceport America in New Mexico on October 18 in order to locate suppliers for its space tourism business.

“This is a fantastic opportunity for companies ranging from local New Mexico firms to national corporations to understand our unique needs for goods and services, including our requirements in building and servicing multiple commercial spaceships as the market further develops,” said Virgin Galactic’s President and CEO George Whitesides. “Our intention is to establish these relationships and emphasize our desire to hire locally as much as possible.”

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The dangerous environment of space

11:01 am

A just released report from the National Academies, Preparing for the High Frontier: the role and training of NASA astronauts in the post-space shuttle era, describes the challenges that NASA faces in staffing its astronaut corps in the coming years. More important, however, is some new information buried in the report about the hazards of long term exposure to weightlessness.

For example, it seems a significant number of astronauts have come back from spending months at ISS with serious vision problems, caused by a newly discovered condition dubbed papilledema, the swelling of the optic disk.
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New images of Apollo landing sites on the Moon

12:45 pm

The Lunar Reconnaissance Orbiter team have released new images of the Apollo 12, 14, and 17 landing sites on the Moon. Below is a cropped image of the Apollo 12 site, showing the trails left by astronauts Pete Conrad and Alan Bean when they walked from their lunar module to Surveyor 3, an unmanned lunar lander that had soft landed there two years earlier. The full image shows some incredible detail.

Apollo 12 landing site

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Some suggestions for keeping ISS occupied

9:06 am

Some suggestions for keeping ISS occupied.

I especially like Harman’s suggestion that the Russians consider landing in the U.S. during the winter, thereby allowing them to extend one crew’s occupancy of ISS into December, January, or even February. Also, he proposes the Russians send an unmanned Soyuz to ISS during testing of the rocket, thereby providing the crews onboard a fresh lifeboat. This is something they have done in the past on their previous space station Mir.

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Amazon Chief’s Spaceship Misfires

12:06 am

Bad news for commercial space: A test of Amazon chief’s Blue Origin spaceship ended in failure on Friday.

After The Wall Street Journal reported on the failure, Blue Origin Friday posted a brief note on its website stating the spacecraft, while going faster than the speed of sound, suffered a “flight instability” at an altitude of 45,000 feet and the company’s automated “range safety system” shut off all thrust and led to its destruction. The problem appeared to stem from thrusters that didn’t respond properly to the initial commands, according to one industry official.

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Don’t you dare touch my space junk!

11:01 am

cataloged objects in orbit

A just released National Research Council report on space junk, Limiting Future Collision Risk to Spacecraft: an assessment of NASA’s meteoroid and orbital debris programs, describes in great and worthwhile detail the increasing problem of orbital debris as well as the technical and budgetary problems that exist for removing it. It is especially worth reading for the stories, such as when a Colorado hiker heard a high-pitched sound and then found a still warm thirty-inch diameter sphere in a foot deep crater. The object turned out to be a titanium tank from a Russian upper stage rocket, launched two months earlier.

What I want to focus on here, however, is one issue the report discusses that, as far as I can tell, has generally been missed. Worse, this issue — somewhat ridiculous when you think about a little — will make removing most of the space junk in Earth orbit far more complicated than ever imagined by engineers.

Simply put, under already agreed-to international treaties, no nation can salvage or collect any debris placed in orbit by another nation. To do so will violate international law, and almost certainly cause an international incident. To quote the report:
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The space shuttle program officially ended on Wednesday

9:23 am

The space shuttle program officially ended on Wednesday. Note however:

Closeout of the shuttle program is an enormous effort expected to take two years. The program occupied 640 facilities and used more than 900,000 pieces of equipment with a value exceeding $12 billion, according to NASA. Much of the work will take place at Kennedy Space Center, where orbiters have been maintained and prepared for launch. NASA requested $89 million for shuttle transition and retirement work in the 2012 fiscal year that begins Oct. 1, but Congress has not yet approved a budget.

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Orbital Sciences gets its launch license for first test of Taurus 2 rocket

2:32 pm

Orbital Sciences has gotten its launch license from the FAA for the first test launch of the Taurus 2 rocket, scheduled for later this year.

This rocket is Orbital’s version of the Falcon 9. It is a new rocket, never before flown, yet after this test it is scheduled to fly the Cygnus capsule on its first flight only two months later. Talk about cutting things close!

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Ground controllers replace a failed circuit box on ISS, using the robot Dextre

6:31 pm

Ground controllers successfully replaced a failed circuit box on ISS this weekend, using the two-armed Dextre robot.

Up to now, exchanging the boxes was done by spacewalkers, which always carries a certain level of risk. Dextre was designed to reduce the need for astronauts to conduct spacewalks for routine maintenance, therefore freeing up the crew’s time for more important activities, like conducting science.

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A preliminary cause for the Russian launch failure has been found

9:19 am

Good news: The Russians have pinned down a preliminary cause for the Progress launch failure last week.

Solving this quickly appears essential, as the space station was not really designed to fly unmanned.

Past NASA risk assessments show there is a one in 10 chance of losing the station within six months if astronauts and cosmonauts are not onboard to deal with any critical systems failures. The probability soars to a frightening one in two chance — a 50-percent probability — if the station is left without a crew for a year.

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Al Gore and the silencing of debate

3:48 pm

Yesterday I posted a link to a story about Al Gore claiming that any expression of skepticism about global warming is to him no different than racism. Here again is what Gore said,

“There came a time when friends or people you work with or people you were in clubs with — you’re much younger than me so you didn’t have to go through this personally — but there came a time when racist comments would come up in the course of the conversation and in years past they were just natural. Then there came a time when people would say, ‘Hey, man why do you talk that way, I mean that is wrong. I don’t go for that so don’t talk that way around me. I just don’t believe that.’ That happened in millions of conversations and slowly the conversation was won. We have to win the conversation on climate.”

More than at any other time, Gore here has very successfully illustrated the differences between how climate skeptics debate the scientific questions of climate change versus how global warming advocates do it.
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