That may be about to change: NASA is preparing a brand new mission that will travel 1 million miles away from Earth in order to map the boundaries of the heliosphere, offering clues to scientists ...

I/ATLAS is a fast, ancient interstellar object. Its odd features fuel both scientific study and speculation. On July 1, ...

The moon and Venus will shine vividly alongside a bright star in the early morning in a celestial rendezvous that should be visible across the U.S.

A recently observed object called 2025 PN7 was found orbiting near the Earth. The quasi-moon is expected to accompany our ...

Three celestial bodies are about to meet up for one night in September in a conjunction that should be widely visible in the U.S. – including Florida.

Uranus's moons — what is unique about each moon and why do they orbit at a tilt?

Mathematicians calculated where the planet might be based on its effects on Uranus, and astronomers searched for less than an ...

AP photographer Dmitri Lovetsky had been trying to photograph a plane flying across the disk of the sun for several days.

Why do all planets in our solar system orbit the Sun the same way? This documentary unravels the cosmic forces, from the solar system’s violent birth to the hidden laws of physics, that keep the ...