Q&A with Keith Gendreau, principal investigator of the first X-ray space communications experiment (members only)

This was the first of the company’s first five commercial satellites for the BlueBird constellation. Liftoff from pad 40 at Cape Canaveral Space Force Station occurred at 4:52 a.m. EDT (0852 UTC).

Watch as the New Horizons team hold a press conference an hour after they received confirmation that the spacecraft had successfully flown by Ultima Thule and had recorded the expected amount of science data.

Orbital ATK readied an upgraded Antares rocket for launch Monday from Wallops Island, Va., to deliver more than 3 tons of crew supplies, science gear, spare parts and three small satellites to the International Space Station to test miniaturized, low-cost technologies for Earth observation applications.