Live coverage: Cygnus supply ship departs space station

A United Launch Alliance Atlas 5 rocket lifted off from Cape Canaveral at 4:18 p.m. EDT (2018 GMT), following a delay of more than an hour to troubleshoot a ground hydraulics controller. The Atlas 5 launched with the U.S. military’s sixth Advanced Extremely High Frequency strategic communications satellite.

The grapple mechanism installed on one end of the space station’s robot arm during a spacewalk Tuesday is experiencing problems. It will be removed during a re-planned spacewalk Monday and the original fitting will be re-installed, NASA said Friday.

SpaceX’s next launch of satellites for the company’s Starlink broadband network — planned in the final days of 2019 — will carry one spacecraft with an experimental coating designed to make it less reflective in orbit, a first step in assuaging concerns from scientists who say the deployment of thousands more Starlink stations would impede some astronomical observations.