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Latest John Callas Stories

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2011-06-03 12:55:00

At NASA, missions are expected to go the extra mile.

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2010-05-22 07:15:00

Earlier this month, Mars Exploration Project manager John Callas updated a NASA audience at the Marshall Space Flight Center about future prospects for the Mars rovers.

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2010-04-01 12:35:00

NASA's Jet Propulsion Laboratory said Wednesday that the sand-trapped Mars rover Spirit failed to make a scheduled communication this week and may have gone into a power-saving hibernation to survive the planet's winter.

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2009-04-14 05:00:00

The team operating NASA's Mars Exploration Rover Spirit is examining data received from Spirit in recent days to diagnose why the rover apparently rebooted its computer at least twice over the April 11-12 weekend.

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2007-07-03 18:05:00

A giant dust storm brewing for more than a week on Mars has become worse and is affecting surface operations of the Mars Exploration Rovers, Spirit and Opportunity.

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2006-03-17 19:55:00

NASA's long-lived Mars rovers demand lots of care as they age and the Martian winter approaches. The period of minimum sunshine is more than 100 days away, but Spirit gets only enough power for about one hour per day of driving on flat ground. And the supply is dropping fast.

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2005-10-25 18:50:00

In August 2003, as the twin Mars Exploration Rovers were barreling toward Mars in their flying saucers, scientists and engineers sent a radio signal disguised as the rovers' "voice" to the Odyssey orbiter at Mars.


Word of the Day
bretelles
  • In dressmaking, straps running from the belt in front over the shoulders to the belt in the back, with more or less elaboration of trimming and outline. They usually broaden at the shoulder and narrow toward the waist.
The word 'bretelles' comes from a French word meaning 'braces'.