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Watch live: SpaceX to launch a small planet hunter for NASA [Updated]

Monday April 16, 2018. 03:04 PM , from Ars Technica
TESS launch

Wednesday update: SpaceX had to scrub Monday's launch attempt due to an unspecified issue with the Falcon 9 rocket's guidance, navigation, and control system. However, after engineers with the California-based company looked at the rocket, it has been declared ready for flight. The 30-second launch window opens at 6:51pm ET (22:51 UTC). Weather conditions in Florida at the launch site are nearly perfect.
The webcast (above) should begin about 15 minutes before the launch window opens. Read below for more background on today's mission, which will attempt to send a cool new planet hunter into space for NASA.
Original post: The wildly successful Kepler Space Telescope was designed to observe faint stars and monitor them for brief dips in brightness that would indicate the passage of an object—most commonly a planet. However, the Kepler telescope was only able to resolve stars only in one specific area of space, about 0.28 percent of the entire sky, so it spied few nearby exoplanets.
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