Image above: The Progress 21 resupply ship is moments away from docking with the International Space Station. The Zvezda Service Module's solar array is clearly visible in this image captured from a station video camera. Credit: NASA TV

Crew unpacks new Progress and prepares for a station re-boost

Commander Pavel Vinogradov and Flight Engineer Jeff Williams have begun unloading supplies from the new Progress 21.
The Russian cargo craft docked to the station Wednesday, April 26.

An older Progress vehicle continues to supply the station with air as needed. That Progress is being loaded with trash and readied for undocking in mid-June to burn up in the Earth's atmosphere.

The station is scheduled for an engine firing, or reboost, which will raise its orbit on Thursday, May 4.

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