Is a sun a star or a planet? Current definitions define a star as a body that generates its own energy. While humans have relied on the sun for hundreds of thousands of years, it's only in the last ...

"We expected to see this effect, but we were still surprised by just how efficient these stars seem to be at engulfing their close planets." Using NASA's Transiting Exoplanet Survey Satellite (TESS), ...

Astronomers are just beginning to scratch the surface of the complex, and sometimes violent, relationships between planets and their parent stars. The red giant star Kepler-56 has a really weird spin, ...

The Psyche spacecraft is on a six-year journey to reach a metal-rich asteroid by the same name. Well into its voyage, the probe looked back at its home planet and captured a rare view of Earth, ...

Space has a knack for bending our sense of scale. The Moon feels close enough to touch—after all, we see its craters with nothing but our eyes. Yet, that 238,855-mile gap between Earth and its lunar ...