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5/25/2008
THE PHOENIX RISES
CATEGORY: Science, Space

                                 NASA’s Mars Phoenix Lander

The National Aeronautics and Space Administration may have had to endure some justifiable criticism for its shortsighted and unimaginative manned space exploration program. But when it comes to its unmanned planetary exploration achievements, the scientists and engineers at JPL and their affiliate programs at universities and other space agencies around the world can still “Wow!” us all every once and awhile.

The Phoenix Mars Lander successfully touched down in the north Polar region of Mars at 6:53 central time today as scientists and engineers at JPL and the University of Arizona cheered the culmination of ten years of enormously stressful work. The spacecraft landed after a harrowing re-entry where a 60 feet per second nose dive is cut by two thirds less than 300 feet above the surface of the red planet by 6 small rocket thrusters.

The last Mars lander to try this trick – the Mars Polar Lander – didn’t make it and plowed ignominiously into the surface. The descent engines cut off too quickly when a sensor in the landing bag was jarred loose and mistakenly told the rockets they had already landed.

Phoenix was put through the wringer with as many tests as the engineers could think of throwing at her. In the end, the ship proved herself tough enough and the landing couldn’t have gone better.

Now comes the fun part. The Phoenix is not a rover so it won’t be wandering around looking for interesting things to examine. The Phoenix is a stationary scientific lab encompassing several disciplines including chemistry, biology, and geology. Having made a jaw droopingly accurate landing (like aiming an arrow from the pitcher’s mound at Dodger Stadium in Los Angeles and hitting home plate at Wrigley Field in Chicago was the way it was described on the Science channel), Phoenix is positioned to do a little digging into what we think is the tundra region of Mars.

It may be too much to ask of luck that we have landed within reach of some Martian snow. If so, call it Jackpot and celebrate our good fortune. More likely, we’ll have to find some moisture in the form of frost or permafrost below the surface. The experiments on board the lander are incredibly sophisticated. While searching for life is not the primary concern (past life on Mars is considered much more probable) the hard, permafrost will be ground down by a special tool attached to a scoop on the robotic arm. The loose material will be heated and a very sensitive gas spectrometer will determine the chemical makeup. In addition, a small but very powerful microscope will examine the contents for micro-fossils and other information.

Phoenix will not last long in the super cold. Within a few months, she will be covered in carbon dioxide ice and stop working. But as long as she is sending pictures back with her stereoscopic camera, the view should be awesome.

So credit where credit is due – to the engineers and scientists at NASA who once again have shown the remarkable reach of the human spirit and its ability to overcome almost any obstacle to satisfy our thirst for knowledge.

UPDATE

Rand Simberg drolly observers “The Cosmic Ghouls Missed One” referring to several Russian and American planetary missions that have come a cropper in one bizarre way or another. The Russians especially have been plagued with bad luck on their Mars landers. Just goes to show how far we are from being able to hurl ourselves out into the void and not ask for volunteers for a suicide mission.

Bob Zubrin’s infectous enthusiasm aside, we ain’t going any time soon so you can cancel your reservation at the Mars Hilton. Until we can figure out how to bring live human beings back from Mars and not dead or half dead boneless (long term space exploration may take up tp 80% of our bone minerals making them as sturdy as balsa wood), heartless (perhaps 80% of the heart muscle gone), kidneyless (ditto kidneys), and God knows what the psychological problems of living and working with 5 or 6 other humans for 3 + years in an extraordinarily small workspace/habitat – until the problem of living without gravity or creating artificial gravity can be overcome, we are stuck here.

So pass the popcorn. Watching from a distance is the best we can hope for – at least in my lifetime.

By: Rick Moran at 7:54 pm
4 Responses to “THE PHOENIX RISES”
  1. 1
    bobwire Said:
    12:14 am 

    Rick says:
    “The National Aeronautics and Space Administration may have had to endure some justifiable criticism for its shortsighted and unimaginative manned space exploration program. But when it comes to its unmanned planetary exploration achievements, the scientists and engineers at JPL and their affiliate programs at universities and other space agencies around the world can still “Wow!” us all every once and awhile.”

    Bush says, Jan 15, 2004:
    Bush also made his case for why manned exploration is needed, rather than sending unmanned missions, such as the Mars rover, Spirit, currently sending information back from the red planet.

    “The human thirst for knowledge ultimately cannot be satisfied by even the most vivid pictures or the most detailed measurements,” he said. “We need to see and examine and touch for ourselves, and only human beings are capable of adapting to the inevitable uncertainties posed by space travel.”

    Rick, don’t be too hard on NASA if they were forced to reckon with the President. If he’s so keen, could we launch him first? Oops, I almost forgot, he failed to show for his physical and lost his wings!

    I am completely behind the unmanned missions around the solar system. The cost and danger of sending humans to Mars is not worth drawing resources away from unmanned explorations. I keenly await the data Phoenix will provide. Nailing the landing, I’m so excited!

  2. 2
    bour3 Said:
    2:45 am 

    Excellent article. Thank you. Brillo pad as always. I meant, brilliant.

    Did you intended credit where it’s due? It’s a problem when sounding it in your head.

  3. 3
    Joseph Somsel Said:
    12:00 pm 

    Indeed, an impressive accomplishment. My professional respects to the engineers who designed and conducted this probe.

    As to human space travel, Mr. Moran is correct that a round trip to Mars will take 3 years using conventional chemical rocket propulsion. However, this could be shortened to 6 months round trip if nuclear propulsion is used. As of 1972, the US had nuclear rocket engines ready for flight testing. However, President Nixon cancelled the whole program.

    The advance that made a nuclear rocket possible was called TRISO fuel. Essentially, uranium ceramic granules the size of sand were coated with multiple layers of silicon carbide and graphite. This permitted the high operating temperatures needed for rockets.

    The core technology from the US nuclear rocket program lives own in South Africa with help from Japanese and American nuclear companies. The pebble bed reactor would use TRISO fuel in its core to allow high temperature operation and a significant increase in operating efficiency in electricity generation. The reactor’s high output temperature would also be the critical milestone needed for chemical processes like hydrogen production from water and nuclear-driven coal-to-liquids conversion.

  4. 4
    bobwire Said:
    8:17 pm 

    Thank you Samsel for your fascinating comment about nuclear propulsion. To shorting the journey to and from Mars to six months easily puts the Red Planet within striking distance.

    I would expect a conventional booster, as it would be hard to support a nuclear blastoff with possibly dire consequences should the mission abort early.

    Still, the funds necessary to research and develop this option uniquely for humans may not find the needed backing. With so much money geared for the mid-East, there is no such funding available.

    Still again, considering Bush’s interest in sending humans to Mars and back, why was not nuclear propulsion funded?

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