Created by the sun, the protective bubble of the heliosphere shields our solar system from harmful radiation. A new mission has launched to map it like never before.

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.

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 ...

Dwarf planet 2023 KQ14, Ammonite, has a stable orbit that challenges the hypothesis of the mysterious Planet Nine.

Did you see the bright star next to the moon? That was Venus, and part of a conjunction between the moon, Venus and the star ...

The formation of Mercury remains an unsolved mystery. The planet closest to the sun has a disproportionately large metallic ...

Our Solar System is home to many unique planetary bodies, including protoplanets and dwarf planets. Here are the unique ...

This week, a rare planet parade featuring Venus, Jupiter, Saturn, Uranus, and Neptune will light up the early morning sky. A ...

Tonight Night Sky Visible planets, stars will offer a range of celestial sights. From bright stars and constellations to planets and clusters, observers can witness multiple events with or without ...

Six planets are hanging out in the sky this month in what's known as a planetary parade.Catch the spectacle while you can because it's the last one of the year. These linkups happen when several ...

Normally when a medium-size star dies, it blasts away the bulk of material in its system. The Hubble discovery was surprising ...

Our solar system is filled with rocky debris tumbling around the sun, most of which is the same age, but sometimes you find something much older.