ESA controllers buy time to solve problems on comet probe Rosetta

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.

Second X-51 hypersonic flight crashes prematurely

Second X-51 hypersonic flight crashes prematurely.

After what the US Air Force described as a ‘flawless’ flight to the launch point aboard a Boeing B-52 mothership, the X-51 was successfully boosted to Mach 5.0 by a rocket booster. The Pratt & Whitney Rocketdyne scramjet engine successfully ignited using its initial fuel, ethylene. During the immediate transition to JP-7, the conventional fuel that makes the X-51 unique, an inlet unstart occurred. A subsequent attempt to restart and reorient to optimal conditions was unsuccessful.

Robot refueling test of satellites to be launched on last shuttle flight

A testbed for testing the robotic refueling of satellites will be installed on ISS on last shuttle flight.

This whole testbed is the brainchild of Frank Cepollina, the man behind all of the Hubble Space Telescope repair missions. Until recently it was doubtful there was room for this project on any shuttle mission. That he nonetheless managed to get it on the last flight is another testament to Cepollina’s incredible ability to get things done. And if the tests work on ISS, NASA will then consider launching operational systems for refueling several perfectly usable climate satellites now in orbit.

Human bones taken to ISS for long space flight experiments.

Human bones were part of the cargo on board the Soyuz capsule launched to ISS today.

“The fragments of human bones will be used to study the causes and dynamics of decalcination of bone tissue in a long space flight,” the head of the experiment, Tatiana Krasheninnikova told Itar-Tass. The problem of decalcination is a headache for medics responsible for spacemen’s health. Researches in this area are conducted by scientists from many ISS member states. However it is impossible to take sample of spacemen’s bones, only their urine is being examined, and a complete picture of dynamics of changes in human bones is not clear, she noted.

NASA Inspector General notes continuing worries about the Mars Science Lab

A NASA Inspector General report issued today [pdf] notes continuing worries about the Mars Science Laboratory, scheduled for launch later this year.

Remaining Unresolved Technical Issues: Although Project managers have overcome the majority of technical issues that led to the [2009] launch delay, as of March 2011 three significant technical issues remain unresolved. . . . Because of technical issues related to these three and other items, Project managers must complete nearly three times the number of critical tasks than originally planned in the few months remaining until launch. [emphasis mine]

Mars 500 mission passes one year

The Russian/ESA Mars 500 mission has completed a year of its 520-day simulated flight to Mars.

The crew, who spent 250 days working on maintenance and scientific experiments before a 30-day stint performing tasks on a simulated Martian surface, are currently on their “return trip” to Earth.

This simulated all-male flight is going better than the last:

In 1999, an experiment in the same Moscow warehouse fell to pieces after a Russian team captain forced a kiss on a Canadian woman, and two Russian crewmembers had a bloody fistfight.

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