spacetoday.net: space news from around the webin association with SpaceNews

Reaction wheel glitch temporarily suspends Kepler operations
Posted: Mon, Jan 21, 2013, 6:52 AM ET (1152 GMT)
Kepler spacecraft illustration (NASA/Ames) NASA's Kepler spacecraft is suspending science operations for ten days to rest a reaction wheel that showed signs of wear, project officials said late last week. One of three operating reaction wheels showed signs of increased friction in operations earlier this month, a symptom of wear that could lead to the loss of the wheel. Kepler uses reaction wheels to maintain its attitude and requires three working wheels for normal operations. One of four wheels on the spacecraft failed last year, raising concerns about the spacecraft's health. During this ten-day rest period the wheels will not be used, and spacecraft thrusters will keep the spacecraft properly pointed, although science observations will be suspended during this time. Kepler, launched nearly four years ago, is now in an extended mission, observing more than 100,000 stars to look for evidence of planets orbiting them.
<<previous article   next article>>
news in brief
Russia launches foreign military satellite
Posted: Sat, Dec 20 12:15 PM ET (1715 GMT)

news links
Monday, December 22
Deferred decision
The Space Review — 5:20 pm ET (2220 GMT)
What is Orion’s technological significance?
The Space Review — 5:19 pm ET (2219 GMT)
Dead trees live!
The Space Review — 5:17 pm ET (2217 GMT)


about spacetoday.net   ·   info@spacetoday.net   ·   mailing list