Red Dwarfs – The Quiet Fires of the Universe

Red Dwarfs – The Quiet Fires of the Universe

A red dwarf is a small, relatively cool star that shines with a dim red light. In terms of size, it’s only about 7% to 50% the mass of our Sun. That means if our Sun were a basketball, a red dwarf might be the size of a golf ball. Their “red” color comes from their cool surface temperatures — usually around 2,000 to 4,000°C.
TOI-700 d

TOI-700 d

In early 2020, NASA’s Transiting Exoplanet Survey Satellite (TESS) quietly made history. Among thousands of worlds it was scanning, it found a small, rocky planet orbiting a dim red-dwarf star about 100 light-years away in the southern constellation Dorado.