Live coverage of the United Launch Alliance Atlas 5 rocket flight to deploy NASA’s TDRS-M data relay satellite. Text updates will appear automatically below; there is no need to reload the page. Follow us on Twitter.
(Launch webcast begins at 7:30 a.m. EDT / 1130 GMT)
Mission Reports
On eve of New Horizons flyby, Ultima Thule still holding onto its mysteries
A day before NASA’s New Horizons spacecraft closes in on a frozen outpost nicknamed Ultima Thule 4.1 billion miles from Earth, basic facts about the city-sized object continued to elude scientists Sunday as the ground team braced for a deluge of data and imagery that should unmask the unexplored world at the frontier of the solar system.