How big would our Solar System be if the Sun was an eleven-inch ... all the way out to Eris. Prince Frederik dies from rare genetic condition at age 22. See his dad's emotional message Campground ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto turns out to have as much complexity as Mars or Earth, so much so that I ...

Explore the planets with NASA There are five officially recognized dwarf planets in our solar system: Ceres, Pluto, Haumea, Makemake, and Eris, according to NASA. What happened to Pluto?

The head of Poland’s space agency was fired over a bungled response to SpaceX debris falling over Polish territory.

According to NASA, multi-planet lineups are visible "every few years," but a seven-planet alignment is particularly uncommon, as each planet's orbit varies, with some moving more quickly and Mercury, ...

As scientists debated what defined a planet, they were actually deciding whether another four planets would join the solar system, (Ceres, Haumea, Makemake, and Eris). Astronomer Mike Brown ...

It has a ring and a small moon called Weywot. Pluto is a dwarf planet in the Kuiper Belt, a region of our solar system past Neptune. NASA captured stunning image of Eris dwarf planet. It is a dwarf ...