Out past Neptune are countless small icy and rocky bodies called Trans-Neptunian Objects (TNOs), and many of these have moons ...

Meteorites are rocks from space that survive their fiery descent through Earth's atmosphere and reach the ground. More than ...

A new classification scheme may help us better understand planet formation — including the history of our own family of worlds.

"These objects really could be anywhere in the solar system at any given time." One million alien visitors from another star system could already be lurking in the solar system. We aren't talking ...

The James Webb Space Telescope has captured its first direct images of carbon dioxide in a planet outside the solar system in HR 8799, a multiplanet system 130 light-years away that has long been a ...

Mar. 17, 2025 — The James Webb Space Telescope has captured its first direct images of carbon dioxide in a planet outside the solar system in HR 8799, a multiplanet system 130 light-years away ...

Our solar system passed through a vast wave of gas and dust around 14 million years ago, dimming Earth’s view of the night sky. The wave may even have left traces in our planet’s geological ...

Credit: University of Western Ontario Gregg, a Ph.D. candidate in physics and astronomy, developed a computer model to study our solar system, Alpha Centauri and the interstellar activity—the ...

The heliosphere, a cosmic bubble formed by the Sun, protects our solar system from interstellar threats and influences life's ...

So exactly how many solar system moons have we found? The answer, it turns out, depends on your definition of a moon. But this is likely just "the tip of the iceberg," Edward Ashton, an astronomer ...

Even the little-understood Oort Cloud, at the outer edges of our solar system beyond view, has a partly spiral structure.