Saturday night's planned launch is already a month late – and could be delayed until late July if storms persist.
Stormy weather could stall this weekend’s launch of space shuttle Endeavour. Forecasters on Wednesday put the odds of acceptable weather at just 40 percent for a Saturday evening launch. Conditions improve only slightly on Sunday.
The space shuttle Endeavour won't launch until July, as NASA engineers try to fix a persistent leak in its external tank.
The delayed launch of Endeavour – caused by a fuel tank leak similar to one that delayed the shuttle Discovery in March – also bumps the launch of a moon reconnaissance mission to Thursday.
The shuttle Atlantis blasted off Monday afternoon to repair the telescope, but the crew's first task will be to check for launch damage.
With custom-made tools and a rescue plan, the seven-member crew of the Atlantis aim to upgrade the iconic telescope.