Live coverage: Atlas 5 countdown and launch journal

The United Launch Alliance Atlas 5 rocket, standing 194 feet tall and and weighing 720,000 pounds, generates 860,000 pounds of thrust from its main engine to launch the Orbital ATK Cygnus cargo ship on the OA-7 mission to the International Space Station.

After assessing any damage to the spaceport caused by Hurricane Dorian as it narrowly missed Florida’s east coast, NASA says the Kennedy Space Center will reopen for normal operations Friday. Teams rolled the Space Launch System’s mobile launch platform from pad 39B back into the cavernous Vehicle Assembly Building last week for safekeeping during the storm.

A Northrop Grumman Cygnus supply ship arrived at the International Space Station on Monday with more than 8,000 pounds of cargo, including new astronaut sleeping quarters, parts for the station’s toilet, and numerous biomedical and technology experiments.