2017年12月12日 星期二

Moon, Mars, and Beyond 2.0

Trump Policy Promises Moon, Mars, and Beyond - Will This Time Be Different?, Space Policy Online

"Bold goals to continue trips to the Moon and go on to Mars envisioned in the immediate post-Apollo period never gained traction, nor did pronouncements by President George H.W. Bush in 1989 or President George W. Bush in 2004. President George W. Bush's plan to return astronauts to the lunar surface by 2020, called Constellation, was cancelled by Obama after a 2009 independent review concluded that NASA would need $3 billion more per year to implement it. Obama decided to focus instead on the "Journey to Mars" with the goal of putting humans in orbit around Mars in the 2030s, bypassing the lunar surface and saving the billions of dollars required to build a lunar landing system and associated lunar surface systems for habitation and exploration."

President Bush Announces New Vision for Space Exploration Program, earlier post (2004)

"Our second goal is to develop and test a new spacecraft, the Crew Exploration Vehicle, by 2008, and to conduct the first manned mission no later than 2014. The Crew Exploration Vehicle will be capable of ferrying astronauts and scientists to the Space Station after the shuttle is retired. But the main purpose of this spacecraft will be to carry astronauts beyond our orbit to other worlds. This will be the first spacecraft of its kind since the Apollo Command Module. Our third goal is to return to the moon by 2020, as the launching point for missions beyond. Beginning no later than 2008, we will send a series of robotic missions to the lunar surface to research and prepare for future human exploration. Using the Crew Exploration Vehicle, we will undertake extended human missions to the moon as early as 2015, with the goal of living and working there for increasingly extended periods. Eugene Cernan, who is with us today -- the last man to set foot on the lunar surface -- said this as he left: "We leave as we came, and God willing as we shall return, with peace and hope for all mankind." America will make those words come true. (Applause.)"

Keith's note: Gene Cernan stood with George Bush in 2004. Jack Schmitt Stood With Donald Trump in 2017. Not much has changed - except that Apollo 17 has now been the last mission where humans walked on another world for 45 years.



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