Live coverage: International crew lands in Kazakhstan

NASA officials say the International Space Station’s logistics chain was designed to absorb a launch failure like the mishap that destroyed an Orbital Sciences Corp. cargo craft in October, but pressure is on SpaceX to deliver supplies on time this year.

A United Launch Alliance Atlas 5 rocket lifted off from Cape Canaveral at 8:29 a.m. EDT (1229 GMT) today to place NASA’s new tracking station into the sky. The data router will relay video, telemetry and science information from the space station and dozens of research satellites to a central ground terminal. Follow the ascent in our live journal.

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