Posted by Emily Lakdawalla on 2007/12/14 05:35 CST
Dust from the sky has settled on both the rover deck and the surrounding landscape. The dust-covered solar cells will not be able to generate as much power as when they were clean. Unless a puff of wind dusts off the solar panels, Spirit may have difficulty surviving the approaching Martian winter.
Posted by A.J.S. Rayl on 2007/11/30 11:00 CST
Nail-biting drama and the inevitable signs of aging marked the month of November for the Mars Exploration Rovers, with Spirit accidentally encountering Tartarus, a dust-filled crater, on its way to its winter haven and having to thrash for its life, and Opportunity spending a lot of its time conducting tests on its RAT (rock abrasion tool), which lost another encoder.
Posted by A.J.S. Rayl on 2007/10/31 12:00 CDT
The Mars Exploration Rovers (MER) logged another major milestone in October as they completed a second Martian year of field geology and now may rove on through 2009.
Posted by Emily Lakdawalla on 2007/10/18 04:07 CDT
The Mars Exploration Rovers have left wheel tracks all over their landing sites, but for some reason this pair of wheel tracks, left in the sand ripple on the rim of Victoria crater and now viewed from below, tickled my fancy. Thanks to James Canvin for the lovely panorama.
Posted by A.J.S. Rayl on 2007/09/30 12:00 CDT
It might not be the stuff of Broadway musicals, but the Sun and did "come out tomorrow" on Mars. Just eight weeks after dust from severe storms darkened the Martian skies and threatened their solar-powered lives, the Mars Exploration Rovers finished dusting off as much as possible and took off on their long-anticipated expeditions this month, with Spirit roving onto an old volcanic formation called Home Plate and Opportunity cruising into Victoria Crater.
Posted by Doug Ellison on 2007/09/13 05:11 CDT
Mars Exploration Rover scientists, engineers and enthusiasts have been playing the waiting game for 10 weeks, watching the much-reported dust storm subside so that Opportunity could get back to doing what it does best - exploring craters.
Posted by Emily Lakdawalla on 2007/09/07 05:27 CDT
I just received another batch of "tau" images from rover camera lead Jim Bell to add to my visualizations of the rovers' dark skies. These pictures provide a direct measurement of the opacity of the atmosphere between the rovers and the Sun.
Posted by A.J.S. Rayl on 2007/08/31 12:00 CDT
With dust from the summer's storms floating down on and all around them, the Mars Exploration Rovers returned to their exploration agendas this month, picking up right where they left off in July when winds kicked the soils up into the southern hemisphere and forced them to hunker down and conserve power.
Posted by Emily Lakdawalla on 2007/08/29 05:06 CDT
I haven't written an update on the dust storm at Mars recently for two reasons. For one, the rovers are out of immediate danger, so it wasn't as urgent. The other reason is that Jim Bell wanted Cornell to issue a press release with updated versions of the images and animations I've been putting together from the rovers' "tau" images.
Posted by Emily Lakdawalla on 2007/08/29 01:26 CDT
Although Mars' atmosphere continues to be rather dusty, the storm has abated enough that both Mars Exploration Rovers have resumed a relatively normal level of activity. For Opportunity, that means a drive to the very edge of Victoria crater.
Posted by A.J.S. Rayl on 2007/07/31 12:00 CDT
It was to be a Martian summer to remember. Just one month ago, the Mars Exploration Rovers were set to embark on long-awaited adventures. At Meridiani Planum, Opportunity was preparing for its grand entrance into the magnificent Victoria Crater and on the other side of the planet Spirit was finally going to explore the top of Home Plate, an old, intriguing volcanic formation in the Gusev Crater area. Then a series of dust storms hit suddenly, it was a Martian summer to remember alright, but for far different, windswept reasons.
Posted by Emily Lakdawalla on 2007/07/23 05:04 CDT
Both Spirit and Opportunity are still suffering under incredibly dark skies, but, amazingly, they are both "power-positive," meaning that they are managing to produce enough power from the limited amount of sunlight to keep the batteries fully charged.
Posted by Emily Lakdawalla on 2007/07/10 11:09 CDT
Opportunity has ceased operations for a couple of days because the amount of sunlight available is low due to an unpredicted dust storm.
Posted by A.J.S. Rayl on 2007/06/30 12:00 CDT
The Mars Exploration Rovers (MERs) spent the month of June finishing work and clearing their agendas at their respective locales at Gusev Crater and Meridiani Planum in preparation for highly anticipated new assignments in July.
Posted by Emily Lakdawalla on 2007/06/12 06:01 CDT
Today, New Scientist and researcher Ron Levin retracted the "puddles on Mars" claim in the face of evidence that the "puddles" were on sloping surfaces. I've updated my original blog entry in response to the claim to that effect.
Posted by A.J.S. Rayl on 2007/05/31 12:00 CDT
The Mars Exploration Rovers sent home field reports this past month -- some 1,200 days into their missions -- that drew gasps of amazement from both the science and engineering teams.