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SCIENCE

NASA prepares to send mankind back to the moon

Video by Gulliver CRAGG

Text by NEWS WIRES

Latest update : 2009-10-12

Forty years after the first astronaut set foot on the Earth's satellite, NASA, the US space agency, is launching two probes on a scouting mission to pave the way for the return of mankind on the moon.

AFP - NASA was set to blast off two probes Thursday on a landmark lunar exploration mission to scout water sources and landing sites in anticipation of sending mankind back to the moon in 2020.
   
Forty years after the 1969 historic first landings on Earth's satellite, the US space agency said it is on course to launch the dual LRO and LCROSS missions atop an Atlas V rocket from Florida's Kennedy Space Center.
   
A day after scrubbing the shuttle Endeavour launch for the second time in a week because of a nagging hydrogen fuel leak, NASA said it has three launch windows ready Thursday at 5:12 pm (2112 GMT), 5:22 pm (2122 GMT) and 5:32 pm (2132 GMT).
   
If none work out, officials have inked in three more opportunities late Friday at 2241 GMT, 2251 GMT and 2301 GMT.
   
Americans were the last people to also walk on the moon in 1972, and the new mission is the first step on the long journey to launch manned missions further into our solar system, to the planet Mars and beyond, from lunar colonies.
   
President Barack Obama has said the program, dubbed the Constellation project, needs to be reviewed, but so far has not cast doubt on its goals.
   
"The robotic mission will give us information we need to make informed decisions about any future human presence on the moon," program manager Todd May told reporters earlier this week.
   
The Lunar Crater Observation and Sensing Satellite (LCROSS) in particular looks set to be one of NASA's most spectacular bids at discovery for years.
   
To seek out water ice on the moon -- a critical component for any planning for manned lunar colonies -- the probe will analyze data from ejected lunar material after the separated Centaur rocket crashes into a permanently shadowed crater, on the dark side of the moon that never sees sunshine.
   
After examining the moon matter, the kamikaze explorer will follow the rocket's lead by also hurling itself into the moon at approximately 1.55 miles per second (2.5 kilometers per second) -- some 5,580 mph (9,000 km/h).
   
In total, NASA said, the two impacts will excavate some 500 metric tons of lunar material and begin the search for a long-frozen water source and examine the moon's mineral makeup.
   
The Lunar Reconnaissance Orbiter, or LRO, hopes to push learn more about the moon through a one-year stay at an orbit of about 31 miles (50 kilometers) -- the closest any spacecraft has continually orbited.
   
LRO's 500-million-dollar mission is designed to provide NASA with maps of unprecedented accuracy, which will be crucial for scoping out possible landing sites.
   
Both missions, May said, will help NASA model the nuances of lunar lighting and temperature range, and provide future moon travelers with information on the cosmic radiation the moon is exposed to due to its lack of atmosphere.
   
The probes' four-day, 238,000 mile (384,000 km) return to the moon 40 years after humans first set foot on its surface is expected to illuminate our closest extra-terrestrial neighbor like never before.
   
"Earth is subject to erosion processes from air and water," noted May. "The moon itself doesn't have this process... LRO will send back pictures daily on things we have barely seen before."
   
Hopes for the ambitious exploration of the moon and later Mars were dampened Wednesday by Senator Bill Nelson, who warned of grounded missions because of "unrealistic" funds allocated to NASA.
   
Nelson, a former space shuttle astronaut, told the first public meeting of the Review of US Human Space Flight Plans Committee in Washington that "NASA simply can't do the job it's been given" to return to the moon.
   
Inadequate funding, he said, "has led us to the point where we are now: with a space shuttle that's going to shut down but without the new rocket developed in time to pick up where the shuttle leaves off."
   
When Obama unveiled the federal budget last month, he ordered a review of the problem-plagued, budget-busting rocket that NASA hopes will be on launch pads by 2015 to replace its shuttle fleet, due to be retired next year.
   
The cost of the next-generation rocket has ballooned from an initial 28 billion dollars to about 44 billion due to technical troubles and cost overruns.

Date created : 2009-06-18

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