Archive for the ‘Mars’ Category

NASA bids farewell to Spirit

Saturday, May 28th, 2011

It looks like the Spirit Mars rover has finally come to the end of its mission. NASA scientists have been unable to contact it and now believe that it failed to come back to life after the long, cold Martian winter. Sad news, but on the other hand the rover’s original mission was only 90 days long.

NASA had hoped to hear from Spirit when the seasons changed. Orbiting spacecraft passing overhead took turns every day hailing Spirit while deep space antennas in California, Spain and Australia listened for any peep.

Mission managers had been weighing whether to scale back the listening campaign to once a week. On Monday, Callas of JPL notified the rover team that he decided against that plan, saying that any continued effort will cut into other missions.

A formal farewell is planned at NASA headquarters after the Memorial Day holiday and will be televised on NASA TV.

You done good, Spirit. We’ll miss you.

Update: Space reporter Miles O’Brien has written a heartfelt farewell to Spirit that is well worth reading.

Opportunity’s 7th anniversary

Thursday, February 3rd, 2011

The Opportunity Mars Rover is going strong, seven years into what was supposed to be a 90-day mission. It’s reached the Santa Maria crater and NASA’s posted some spectacular panoramas of the vista.

Opportunity landed in the Meridiani Planum region of Mars on Jan. 24, 2004, Universal Time (Jan. 25, Pacific Time) for a mission originally planned to last for three months. Since that prime mission, the rover has continued to work in bonus-time extended missions. Both Opportunity and its twin, Spirit, have made important discoveries about wet environments on ancient Mars that may have been favorable for supporting microbial life.

By mid-January 2011, Opportunity reached a location at the southeastern edge of Santa Maria crater. The rover team developed plans for Opportunity to spend a few weeks investigating rocks at that site during solar conjunction, a period when communications between Earth and Mars are curtailed because the sun is almost directly between the two planets.

A blue sunset

Wednesday, December 22nd, 2010

Here’a a sensawunder post for you – a video of a sunset on Mars created from images taken by the Mars rover, Opportunity in November of this year. Sunset on another planet – what could be cooler than that?

Spirit may have found evidence of water on Mars

Friday, October 29th, 2010

NASA’s Spirit rover, stuck in the cold sand of a Martian winter, may have found evidence that there is, or recently has been water on Mars. But it may be it’s last discovery.  Its solar panels are pointed away from the sun, and it may not wake up from the long Martian winter.

Spirit’s wheels broke through the crust of a sand pit called “Troy” in April 2009, after five years spent mostly exploring a region called Home Plate. NASA officially gave up on trying to extract the rover in January.

But the soil exposed by Spirit’s spinning wheels carries clues that Mars may still be wet. The newly exposed surface layers include minerals thought to be hematite, silica and gypsum, which don’t dissolve easily in water. But layers of iron sulfate minerals, which do dissolve easily, lie centimeters below the crust.

These layers suggest water, maybe in the form of frost or snow, seeped into the ground relatively recently and carried the soluble minerals deeper into the soil. The seepage could have happened during cycles in Mars’ history when the planet tilted further on its axis.

None of these soluble minerals are exposed at the Martian surface, which indicates the soil interacted with water recently, and probably continuously. Because the Martian surface is constantly being sculpted by wind, these layers would have eroded away if they were laid down long ago.

Phoenix won’t rise again

Tuesday, May 25th, 2010

It looks like NASA’s Mars Phoenix lander won’t be rising again, as photos taken from orbit show signs that the lander’s solar panels were severely damaged by ice during the long Martian winter.

“The 2008 lander image shows two relatively blue spots on either side corresponding to the spacecraft’s clean circular solar panels. In the 2010 image scientists see a dark shadow that could be the lander body and eastern solar panel, but no shadow from the western solar panel.”

Our favourite Martians

Sunday, January 31st, 2010

It’s been six years since the rovers Spirit and Opportunity landed on Mars and they’re still working. Spirit is stuck in a sand trap and it’s roving days are over, but it can still provide valuable science data. Opportunity is heading to Endeavour Crater, the biggest crater on its mission. Not bad for a couple of machines that were only designed to work for 90 days.

Air and Space has an article about the rovers and the peculiar relationship that’s formed between them and the science team that runs them. The machines are now something more than machines, more like pets, and in some ways even more than that.

The mystique of the rovers has even touched Native American culture. Tim McCoy, a geologist at the Smithsonian Institution’s National Museum of Natural History, has been on the rover team for the last four years. He’s also a citizen of the Miami tribe from the Midwest. In their Algonquian language, explains McCoy, the Miami confer “animacy” on certain beings, such as people, animals, some plants, and ome natural phenomena, such as thunder. “Anthropomorphizing is not the right word,” he says. “It’s hard to describe. Some things have a living force to them, a spirit of sorts.”The Miami elders decide what types of modern technology have animacy. Cars do. Trains don’t. “I had heard Janet Vertesi talk in a rover team meeting about the boundary in her mind between people and machines,” says McCoy. “She was sort of struggling with that. But from a Native American sense, there’s no struggle there, no apparent conflict.”

McCoy and a Miami tribesman colleague who is a linguist at Miami University of Ohio debated whether the rovers had animacy. They went to a tribal elder and described what a rover is and how it works with humans. The elder pondered the question, then proclaimed that the rovers have animacy. A group of about 20 undergraduates from theMiami tribe at the university then named the rovers “neehpikalaankwa keeyosia,” or “the red star wanderer.” “To the Miami,” says McCoy, “the wanderer performs an important task as he or she gathers useful information during wanderings and brings it back for the community.”

McCoy shared the story with the rover team.“They weren’t surprised. You really feel like this thing is an extension of you. When one of them dies, there’s going to be a tangible loss and a period of grieving.”