Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

Among the roughly 10 billion white dwarf stars in the Milky Way galaxy, a greater number than previously expected could ...

Most of the planets are aligned in our night sky right now, providing a treat for skywatchers. Are such "planetary parades" ...

Scientists have long overlooked white dwarfs as hosts for habitable exoplanets, assuming their lack of fusion would make life ...

Ceres, the largest object in the asteroid belt, may hold answers to fundamental questions about the Solar System. This dwarf ...

Astronomers have discovered that sulfur may be a key to helping us narrow down our search for life on other planets. It's not ...

Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.

White dwarf stars could host habitable planets. Fast planetary rotation reduces cloud cover, keeping surface temperatures stable.

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...

To spot dwarf planets, you would need a telescope with at least an eight-inch aperture. But for serious observations, larger apertures and high-quality eyepieces are a must. Plus, equatorial mounts ...