HD 20794 d completes its orbit just shy of two Earth years, placing it well within reach of conditions that might harbor life ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

Located less than 20 light years away, HD 20794d could potentially be one of the most Earth-like planets found so far, ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in ...

Further simulations on flybys into the inner Solar System revealed one of our own planets might be flung out of the ballpark ...

The risk of impact is likely to drop to zero as observations of Asteroid 2024 YR4 continue.

Scientists found an intriguing world in our galaxy.

A new study suggests that a close encounter with a massive interstellar object, possibly eight times the mass of Jupiter, may ...