![]() ![]() As an orbiting planet tugs on its star, the starlight we see shifts from blue to red and back again. The wobble method of planet hunting relies on sensitive spectroscopes. In 1995, astronomers discovered that a star in the constellation Pegasus was wobbling back and forth, tugged by the gravity of an unseen planet, an exoplanet, a hot and hellish world unfit for life as we know it. Only three decades ago we didn’t know if there were planets beyond our own solar system. ![]() Our Milky Way galaxy is strewn with billions of planets, alien worlds still unseen by human eyes - at least for now. ![]() Transcript From 2018: How NASA’s TESS Spacecraft Will Hunt Exoplanets NASA’s TESS spacecraft is searching the sky for nearby alien worlds.
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