NASAのインスタグラム(nasa) - 4月19日 09時10分

LIFTOFF! Our Transiting Exoplanet Survey Satellite (TESS) launched at 6:51 p.m. EDT from Space Launch Complex 40 on Cape Canaveral Air Force Station in Florida to search for unknown worlds beyond our solar system.
When a planet crosses in front of the star it’s orbiting, that event is called a transit – and the telltale sign of a transit is a drop in the brightness of that star’s light. TESS is heading into high Earth orbit, where it will rely on the transit method to locate planets that are outside our solar system, but close enough to study with ground-based telescopes. Since its launch in 2009, our Kepler space telescope has discovered nearly 2,700 of these worlds orbiting other stars known as “exoplanets” using the transit method. Now Kepler, the past master of transits, is passing the torch of discovery to TESS whose adventure is just beginning... Credit: NASA
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