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Liftoff is at 1:35 p.m. EDT (1735 GMT) Designated Space Based Infrared System Geosynchronous Earth Orbit Flight 5 (SBIRS Geo-5), the mission marks ULA's first launch so far this year. However, the company has a busy summer planned, including the launch of Boeing's Starliner crew capsule to the International Space Station. That mission, called OFT-2, will be the spacecraft's second uncrewed orbital flight test. The first, which occurred in Dec. 2019, failed to reach the space station due to a software issue. Following a successful second flight test, Boeing will launch its first crew of astronauts later this year. Weather...

SpaceX plans to launch the secret Zuma payload for the U.S. government this evening (Jan. 7), after a nearly two-month delay. Zuma is scheduled to lift off atop a two-stage Falcon 9 rocket from Florida's Cape Canaveral Air Force Station tonight between 8 p.m. and 10 p.m. EST (0100 to 0300 GMT on Jan. 8). You can watch it live here at Space.com, courtesy of the company. You can also watch the liftoff directly from SpaceX's live webcast page here.  Sunday's launch will also include a landing attempt by the Falcon 9's first stage, which will come back down to Earth...