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Mars Spacecraft Faces Riskiest Part of Mission |
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Mars Spacecraft Faces Riskiest Part of Mission TechnologyMars Spacecraft Faces Riskiest Part of MissionMars Spacecraft Faces Riskiest Part of MissionThe Associated PressNASA's Phoenix spacecraft is set to descend to the surface of Mars for 90-day mission to excavate soil and ice. NASA hopes the mission will illuminate whether the site could have supported microbial life. (May 24)[Notes:ANCHOR VOICE] [Notes:VO--NASA ANIMATION OF PHOENIX]AFTER TRAVELING NEARLY TEN MONTHS IN SPACE -- THE PHOENIX MARS LANDER IS ABOUT TO TOUCH DOWN ON THE SURFACE OF MARS.IF ALL GOES ACCORDING TO PLAN -- IT WILL LAND ON THE PLANET'S NORTHERN POLAR REGION WHERE SCIENTISTS THINK THERE ARE VAST AMOUNTS OF UNDERGROUND ICE -- AND PERHAPS TRACES OF ORGANIC COMPOUNDS -- AN ESSENTIAL INGREDIENT FOR LIFE [Notes:SOT--DOUG MCCUISTION/NASA MARS EXPLORATION PROGRAMME] "This is truly the defining moment of this mission. Nonetheless global success rate for getting to the surface of Mars is less than 50 percent. The challenges that that represents requires perseverance from a team like this so Phoenix doesn't become another statistic." [Notes:VO--ANIMATION OF PHOENIX]THE LANDER WILL RELY ON ITS HEAT SHIELD -- IT'S PARACHUTE -- AND A DOZEN THRUSTERS TO SLOW ITSELF DOWN FROM 12 THOUSAND MILES PER HOUR TO JUST 5 MILES PER HOUR IN ONLY A FEW MINUTES. [Notes:SOT--- DOUG MCCUISTION/NASA] " "There is a lot of uncertainties left. There is still the potential for a manoeuvre that's gonna be discussed. There is also just typically the unknown that occur on Mars. Mars is always there to throw those unknowns at us." [Notes:VO --ANIMATION OF PHOENIX]IF SUCCESSFUL -- PHOENIX WILL JOIN TWO OTHER SPACECRAFT ON THE MARTIAN SURFACE -- "SPIRIT" AND "OPPORTUNITY," THE TWO ROVERS THAT LANDED FOUR YEARS AGO AND HAVE BEEN EXPLORING THE PLANET'S EQUATOR. [Notes:VO--PHOTO OF VIKING MISSION] HOWEVER -- NASA HASN'T HAD A SUCCESSFUL *POWERED* LANDING SINCE THE MARS VIKING MISSION IN 1976. [Notes:VO--PHOTO OF MARS POLAR LANDER]THE LAST TIME NASA MADE AN ATTEMPT WAS 1999 WHEN THE MARS POLAR LANDER CUT OFF ITS ENGINES TOO QUICKLY AND CRASHED INTO THE SOUTH POLE DURING A COMMUNICATIONS BLACKOUT. ___ ___, The Associated Press.
Fecha : 25 mayo 2008 - 08:07:16
Tags : mission Tech part spacecraft nasa riskiest mars faces
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