Live coverage: Cygnus supply ship arrives at International Space Station

A typhoon forecast to move near a ground station in Guam on Monday has forced officials to postpone the launch of a Japanese HTV cargo ship loaded with more than 13,000 pounds of supplies, experiments and a replacement set of batteries for the International Space Station.

For the second time in a year, a large spent Chinese rocket stage intentionally left in orbit is heading for an unguided plunge back into Earth’s atmosphere Saturday or Sunday somewhere between 41.5 degrees north and south latitude.

The gates to the Johnson Space Center have been closed to all but essential personnel as heavy rains from Tropical Storm Harvey inundate the Houston area. Flight controllers are on lock down at the Mission Control Center but continue to monitor the health of the International Space Station as usual.