Learn about the size, temperature, and colour of each planet, and discover why Pluto is no longer considered a planet.

Called Kepler-51, the Sun-like yellow dwarf star was found in 2012 to have three exoplanets in its orbit; each, it would turn ...

(AP) — Astronomers have discovered a rare in-sync solar system with six planets moving ... can help explain how solar systems across the Milky Way galaxy came to be. This one is 100 light ...

If Brown’s hidden world is real, Rubin will almost certainly find it or strong indirect evidence that it exists. “In the ...

Related: White dwarfs are 'heavy metal' zombie stars endlessly cannibalizing their dead planetary systems "It's the only bona fide way to actually figure out what planets outside the solar system ...

Astronomers have discovered a pair of young stars near the supermassive black hole at the heart of our galaxy. Studying them ...

Astronomers have spotted the shiniest known planet in the Milky Way, and it has metal ... only bounces back 30% of its sunlight. Venus, the solar system's shiniest planet, reflects 75% of the ...

Milky Way May Have Billions of Earth-Like Planets There could be as many as 40 billion habitable Earth-size planets in the galaxy, according to a new study. WSJ's Monika Vosough reports.

This composite of planets in our solar system was taken by various NASA spacecraft. Included in the image are (from top to bottom) Jupiter, Saturn, Uranus, and Neptune. Credit: NASA/JPL.

The discovery could lead to the finding of more planets ... made near the Milky Way's supermassive black hole. Scientists have uncovered the existence of a binary star system close to the black ...

The supermassive black hole at the center of our Milky Way galaxy is associated with wanton ... marks the first time that a binary star system has been observed in the vicinity of a supermassive ...

CINCINNATI (WKRC) - Astronomers have made a groundbreaking discovery, revealing the existence of "cosmic tunnels" that connect our solar system to other stars. Using data from the eRosita X-ray ...