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Surprise! TESS Shows Ancient North Star Undergoes Eclipses

7 Jan 2020, 00:15 UTC
Surprise! TESS Shows Ancient North Star Undergoes Eclipses NASA/MIT/TESS

Astronomers using data from NASA’s Transiting Exoplanet Survey Satellite (TESS) have shown that Alpha Draconis, a well-studied star visible to the naked eye, and its fainter companion star regularly eclipse each other. While astronomers previously knew this was a binary system, the mutual eclipses came as a complete surprise.

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