Atlas 5/Cygnus post-launch news conference

A logistics-delivery vessel for the International Space Station, launched and operated privately by commercial companies on behalf of NASA, is scheduled to arrive at the lab complex Saturday at 6:05 a.m. EDT (1005 GMT).

Two astronauts floated outside the International Space Station early Tuesday and replaced one of the grapple fixtures on the end of the lab’s robot arm, the first of two excursions over the next week to complete a complex overhaul that began with a pair of spacewalks last October.

Check out one more gallery of photos from Sunday’s blastoff of a SpaceX Falcon rocket from launch pad 39A at NASA’s Kennedy Space Center in Florida.