Spacecraft on target for Mars landing Sunday - Mercedes-Benz Forum

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post #1 of 36 (permalink) Old 05-25-2008, 04:48 PM Thread Starter
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Spacecraft on target for Mars landing Sunday

PASADENA, California (Reuters) - A robotic probe careening toward Mars was perfectly positioned for a landing at the planet's frozen north pole on Sunday, where it will search for water and assess conditions for sustaining life, U.S. space scientists said.

Flight controllers at NASA's Jet Propulsion Laboratory in Pasadena passed up a final opportunity to tweak the spacecraft's path earlier on Sunday, convinced the 1,400-pound (635 kg) probe, named Phoenix, was on target for touch down.

After a do-or-die plunge through Mars' thin atmosphere, Phoenix was expected to reach the surface at 7:53 p.m. EDT.

"We have nothing left to do but land," mission manager Barry Goldstein said. "We're just watching and waiting."

Pulled by Mars' gravity, Phoenix was traveling at 85,000 miles per hour. By the time it reaches the red planet's atmosphere at 7:46 p.m. EDT the probe was expected to be tearing along at 12,700 mph (20,400 kph).

Within a period of seven minutes, a heat shield, parachute and thruster rockets must work perfectly for Phoenix to land gently in Mars' arctic circle.

Scientists found in 2002 that Mars' polar regions have vast reservoirs of water frozen beneath a shallow layer of soil. Phoenix was launched August 4, 2007, to sample the water and determine if the right ingredients for life are present.

NASA attempted a landing on Mars' south pole in 1999, but a problem during the final minutes of descent ended the mission.

The U.S. space agency canceled its next Mars lander but successfully dispatched two rovers, Spirit and Opportunity, to the planet's equatorial region to search for signs of past surface water.

Phoenix was created out of spare parts from the failed Polar Lander mission and the mothballed probe. Unlike the rovers, Phoenix will not be bouncing to the planet's surface in airbags, which are not suitable for larger spacecraft.

Instead, like the 1970s-era Viking probes and the failed Polar Lander mission, it uses a jet pack to lower itself to the ground and fold-out legs to land on.

"We haven't landed successfully on legs and propulsive rockets in 32 years," NASA's space sciences chief Ed Weiler told Reuters. "When we send humans there, women and men, they're going to be landing on rockets and legs, so it's important to show that we still know how to do this."

"If spending money you don't have is the height of stupidity, borrowing money to give it away is the height of insanity." -- anon
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post #2 of 36 (permalink) Old 05-25-2008, 05:08 PM
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Let's hope they have their inches and centimetres sorted this time.

"Religion is regarded by the common people as true, by the wise as false, and by the rulers as useful" - Seneca
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post #3 of 36 (permalink) Old 05-25-2008, 05:16 PM
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I am tuned in; it's going to be interesting and like Dope said, let's hope they weren't on dope when they wrote the parameters that control the software for landing.
In a few months my "kids" are doing a re-entry (called a burn) of a bird we had for a couple of years that's running on fumes. I was part of the re-entry math stuff and I have secretly plugged in Jayhawk's garage as a suitable impact zone.
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post #4 of 36 (permalink) Old 05-25-2008, 05:18 PM Thread Starter
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Live coverage of the event is available on the Science channel at this very moment.

"If spending money you don't have is the height of stupidity, borrowing money to give it away is the height of insanity." -- anon
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post #5 of 36 (permalink) Old 05-25-2008, 05:18 PM
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I am tuned in; it's going to be interesting and like Dope said, let's hope they weren't on dope when they wrote the parameters that control the software for landing.
In a few months my "kids" are doing a re-entry (called a burn) of a bird we had for a couple of years that's running on fumes. I was part of the re-entry math stuff and I have secretly plugged in Jayhawk's garage as a suitable impact zone.
Dope is a nice sauce or gravy which makes your plain boring food taste better.

"Religion is regarded by the common people as true, by the wise as false, and by the rulers as useful" - Seneca
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post #6 of 36 (permalink) Old 05-25-2008, 05:20 PM
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Originally Posted by dope View Post
Dope is a nice sauce or gravy which makes your plain boring food taste better.
I like red mushrooms with while dots
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post #7 of 36 (permalink) Old 05-25-2008, 05:46 PM Thread Starter
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Fifteen minutes......

"If spending money you don't have is the height of stupidity, borrowing money to give it away is the height of insanity." -- anon
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post #8 of 36 (permalink) Old 05-25-2008, 05:59 PM Thread Starter
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Touchdown!

"If spending money you don't have is the height of stupidity, borrowing money to give it away is the height of insanity." -- anon
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post #9 of 36 (permalink) Old 05-25-2008, 07:40 PM
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post #10 of 36 (permalink) Old 05-25-2008, 07:46 PM Thread Starter
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Hey, this is no hoax. I saw the landing with my own two eyes.

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