Live coverage: Atlas 5 countdown and launch journal

Sensors delivered to Mars by NASA’s InSight lander have detected the first signals suggesting seismic activity on the red planet, a major discovery that extends the field of seismology to a new world beyond the Earth and the moon.

The Global Positioning System, its precision navigation and timing services made possible by the U.S. Air Force and provided free-of-charge to the planet’s civilian population, is a marvel of the modern world, and the orbiting network will receive a fresh satellite Wednesday.

This is the launch timeline to be followed by the Atlas 5 rocket’s ascent into orbit from Cape Canaveral with the GOES-S weather satellite. Launch is scheduled for Thursday during a two-hour window opening at 5:02 p.m. EST (2202 GMT).