Gallery: Antares rocket explodes

Concluding 80 days attached the International Space Station, the commercial Cygnus cargo ship will be detached to fly away Tuesday for an unprecedented onboard fire experiment before re-entering the atmosphere next week.

A forecast of low ceilings, thick clouds and rainy weather Thursday has led NASA and Northrop Grumman officials to push back the launch of an Antares rocket and a space station-bound supply ship from Virginia’s Eastern Shore to Friday morning.

Northrop Grumman’s Antares rocket will deliver a Cygnus supply ship into orbit Saturday to begin a two-day pursuit of the International Space Station.