Tuesday, August 14, 2007

Phoenix Mars Lander

Phoenix Mars Lander Launch - August 4, 2007

Phoenix Mars Lander - 2007

Phoenix Mars Lander in the Lab


The North Polar Ice Cap of Mars

Mars Map Showing Locations of Mars Landers

Phoenix Mars Lander Seal

CAPE CANAVERAL, Fla. — A robotic dirt and ice digger blasted off Saturday, August 4th, 2007 on a 422 million-mile journey to Mars that NASA hopes will culminate next spring in the first ever landing within the red planet's Arctic Circle.

The unmanned Delta rocket carrying the Phoenix Mars Lander rose from its seaside pad at 5:26 a.m., exactly on time, and hurtled through the clear moonlit sky. It was easily visible for nearly five minutes, a bright orange speck in a spray of stars.

If all goes as planned — a big if considering only five of the world's 15 attempts to land on Mars have succeeded — the spacecraft will set down on the Martian Arctic plains on May 25, 2008, and spend three months scooping up soil and ice, and analyzing the samples in minuscule ovens and mixing bowls.

The Phoenix Mars Lander won't be looking for evidence of life on Mars but rather traces of organic compounds in the baked and moistened samples, which would be a possible indicator of conditions favorable for life, either now or once upon a time.

If organic compounds are present on Mars, they're more likely to have been preserved in ice. That's why NASA is aiming for the planet's high northern latitudes, where ice is almost certainly lurking just beneath the surface.

Only about six inches of soft red soil should cover the ice, and so the digger shouldn't have to probe too deeply. The ice is expected to be as hard as concrete, and a drill on the scoop will help gather enough frozen samples. Some dirt and ice samples will be baked and their vapors analyzed. Other soil samples will be mixed with onboard water and the muddy soup examined by onboard microscopes.

"We're really going there just to understand whether the conditions might have been hospitable for microbial life at some point," said the University of Arizona's William Boynton, lead scientist for the oven experiment.

Even if organic molecules pop up, they could be from incoming meteorites, Boynton noted. "It is important, I think, to keep in mind that we are just looking for organic molecules to see if the conditions are right that they could survive," he said, "and that we aren't really going to be making any inference about whether these molecules are indicative of life."

Mars landings are especially risky. Only five of the 15 U.S., Russian and European attempts have worked, all of them American successes beginning with the 1976 Viking touchdowns. Given those odds, the Phoenix team said it did everything possible to test for failures and will continue to do so as the spacecraft flies to Mars. The entire mission costs $420 million.

NASA has never attempted to land a spacecraft on Mars at such a high northern latitude. A lander intended for the red planet's South Pole went silent immediately upon arrival in 1999. That failure, combined with the loss of the companion Mars orbiter, prompted NASA to cancel a 2001 lander mission. The parts from that scrapped mission were used for Phoenix, thus its name, which alludes to the mythological bird that rises from its own ashes.

Phoenix should help pave the way for human visitors, especially if it confirms the presence of water ice in large amounts near the pole, said Michael Meyer, NASA's lead Mars scientist. That would be a tremendous resource, he noted. But if organic matter is indeed found, it could pose a dichotomy: "As Mars gets more interesting, you may not want to send humans right away until you learn out a little bit more about the red planet and find out whether or not life ever got started there."

Science fiction writer Kim Stanley Robinson, whose novel "Green Mars" is one of dozens of writings going up on a disk aboard Phoenix, is thrilled to see another robot headed to Mars.

The photos beamed back by recent Mars spacecraft "are just astonishingly precise compared to what I got to deal with when I was working on my books," he said. "It's like putting on glasses after you've been semi-blind all your life."

"I'm quite confident that humans will go to Mars and I do think it's important," Robinson said Friday. "When people get there, they'll be able to do on the ground what maybe 100 robotic missions would have been able to do."

Check out the article at Fox News.

This is so interesting! What's more, it brings us one step closer to understanding Mars and sending manned missions there in the future!

Be sure to check out the Mars Exploration Timeline at the official Phoenix Mars Lander website.

Check out my previous Mars posts: Martian Terraforming and Water on Mars!

If you have never checked out Kim Stanley Robinson's Mars Trilogy, you don't know what you're missing!!!

Kim Stanley Robinson's Mars Trilogy

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