Alternatives
Proposed manned Commercial Crew Development Vehicle alternatives to Ares I for servicing the Space Station are the Boeing/Bigelow Aerospace unofficially-named "Orion-Lite" capsule launched on a future-man-rated Delta IV Heavy, the manned version of the SpaceX Dragon spacecraft, and Sierra Nevada Dreamchaser. None of these spacecraft are designed to leave low earth orbit as required for lunar missions and the majority of the Constellation program, they are purely alternative methods for space station access.
Read more about this topic: Constellation Program
Famous quotes containing the word alternatives:
“The last alternatives they face
Of face, without the life to save,
Being from all salvation weaned
A stag charged both at heel and head:
Who would come back is turned a fiend
Instructed by the fiery dead.”
—Allen Tate (1899–1979)
“Clearly, society has a tremendous stake in insisting on a woman’s natural fitness for the career of mother: the alternatives are all too expensive.”
—Ann Oakley (b. 1944)
“The literal alternatives to [abortion] are suicide, motherhood, and, some would add, madness. Consequently, there is some confusion, discomfort, and cynicism greeting efforts to “find” or “emphasize” or “identify” alternatives to abortion.”
—Connie J. Downey (b. 1934)