Betelgeuse dimmed dramatically, prompting theories of an impending supernova. Instead, astronomers uncovered an even stranger ...

The star is Betelgeuse, a red supergiant in the constellation Orion. The asteroid is 319 Leona, a slowly rotating, oblong space rock in the main asteroid belt between Mars and Jupiter.

But unlike the brightening Betelgeuse, that star has been consistently dimming over the past 100 years. "A hundred years ago, VY CMa used to be visible to the naked eye," said Montargès.

Betelgeuse, one of the most luminous stars visible from Earth, continues to surprise astronomers. The red giant’s brightness fluctuations have long intrigued scientists, ...

Betelgeuse, one of the brightest stars in the sky, may have a secret sunlike companion that drives the star’s mysterious six-year-long "heartbeat," new research suggests.

The supergiant star Betelgeuse may have a companion star that pushes light-blocking dust out of the way, causing the irregular changes observed in the star's brightness.

The companion star, if it exists, is roughly the same mass of our Sun, and may explain Betelgeuse’s long secondary period (LSP)—a 2,170-day (6-year) cycle during which the supergiant dims and ...

Betelgeuse (pronounced like the Tim Burton character Beetlejuice) is a relatively young star in the Earth's backyard, located in the Milky Way about 640 light-years away.

This image made with the Hubble Space Telescope and released by NASA on Aug. 10, 2020, shows the star Alpha Orionis, or Betelgeuse, a red supergiant that is about 700 million light years from Earth.

Stars like Betelgeuse can live in excess of 10 million years – a very brief period to astronomers, but a very long time to anyone else. Despite this, ...

Betelgeuse, one of the brightest stars in the sky, may have a secret sunlike companion that drives the star’s mysterious six-year-long "heartbeat," new research suggests.

Betelgeuse, the second-brightest star in the constellation Orion, is a giant star whose strange dimming has sparked debate over when it will collapse and explode in a massive supernova.Now ...