Passing stars could trigger instability across the solar system, resulting in Earth being hauled out of its orbit.

No telescope has basked in the night sky quite like this before. Here's what it could reveal about the universe.

The Solar System might not be as quiet and orderly as we think. Imagine one day looking up and seeing something strange in ...

Ancient supernovas may have blasted Earth with powerful radiation, causing dramatic changes in our climate, and could do so ...

OF201, the object belongs to the same all-star family as Pluto: dwarf planets. Its diameter, roughly 435 miles (700 km), is ...

Cosmoknowledge's video highlights the cosmic forces protecting life on Earth. The Moon stabilizes our oceans and absorbs asteroid impacts, while Jupiter deflects space debris. The Sun's heliosphere ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

Given just how big space is, the solar system seems like it shouldn't be too mysterious. But there are actually plenty of ...