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

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

New findings offer clues about the ancient origins of asteroids and their potential role in the formation of terrestrial ...

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

New research shows that star activity can distort exoplanet measurements, affecting size, temperature, and atmosphere ...

Here’s how it works. A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the orbits of the four outer planets ...

Our solar system’s planets are set to align in a six-strong planetary parade this week that will be visible in the UK night sky. The celestial event is set to be an extension of the already impressive ...