Live coverage of the countdown and flight of a Delta 4-Heavy rocket carrying NASA’s Orion space capsule on its first test flight in Earth orbit. Text updates will appear automatically below; there is no need to reload the page. Follow us on Twitter.
Delta 4
Delta 4-Heavy launch with spy satellite pushed back to January
After unusual concentrations of hydrogen around the rocket foiled a launch attempt Dec. 19, United Launch Alliance said Friday that the company’s powerful Delta 4-Heavy launcher and a U.S. government spy satellite will remain grounded in California until at least Jan. 6 as engineers troubleshoot a small fuel leak.
