SpaceX poised to launch 'world's most powerful rocket'

SpaceX is poised for the first test launch Tuesday of its Falcon Heavy, which aims to become the world's most powerful rocket in operation, capable of reaching the Moon or Mars some day.

NASA astronauts test new exercises on space walk

Two astronauts floated out of the International Space Station on Wednesday after trying out new exercises aimed at preventing decompression sickness while conserving oxygen, NASA said.

Successful SpaceX escape test 'bodes well for future'

SpaceX's Dragon capsule sailed through the first flight test of its emergency astronaut escape feature Wednesday, a critical step toward launching people into space from US soil in the next two years.

Shuttle Enterprise to fly over New York

The US space shuttle Enterprise on Friday leaves the US capital atop a Boeing 747 jet for a final flyover of New York City as it heads toward a museum where it will go on display.

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