These linkups happen when several planets appear to line up in the night sky at once. Such parades are fairly common, ...

But it’s not just looks. Rocky composition, general size, orbital behaviors—a lot of those qualities can be the same on both ...

How do tidal forces shape a planet's orbital evolution, especially for those in the habitable zone? A recently submitted ...

In science fiction, twin suns mean alien skies — but in reality, binary star systems are common. Could they actually create ...

This black hole could then grow and consume the entire planet, turning it into a black hole with the same mass as the ...

Scientists’ model indicates that dark matter inside gas giants could collapse into black holes detectable by observation.

Half a dozen planets - Mercury, Venus, Jupiter, Saturn, Uranus and Neptune - will put on a dazzling display in the sky on ...

On Aug. 24, 2006, the International Astronomical Union (IAU) decided that Pluto wasn't a planet anymore. Instead, Pluto is ...

Without other planets or the Moon, Earth would lose tides, gravity stability, and the conditions necessary for life.

Researchers suggest gas giants might gather dark matter until their cores collapse into planet-sized black holes.

Stargazers are excited as a rare planet parade is expected to happen this weekend bringing some of the main characters of our ...

For decades, astronomers have wondered what the very first stars in the universe were like. These stars formed new chemical ...