The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

Astronomers have discovered a "fossil" world lying in the outskirts of the solar system, according to new research.

The Solar System is a fascinating place, with each planet orbiting the Sun at its own unique distance. But how far apart are these planets, and how do they travel through space? Uncover the true scale ...

For example, Atkin proposes that megameters (Mm, 10 6 m), gigameters (Gm, 10 9 m), and terameters (Tm, 10 12 m) be used for planetary- and solar system-scale distances, making Earth’s radius 6. ...

It’s currently 132 astronomical units (au) from the Sun—1 au being the distance between the Earth and Sun, which is the unit of measurement used by astronomers to describe the Solar System.

Solar system distances are measured in astronomical units, but even this unit becomes to small when measuring the distance to the nearest star.

An artist's illustration imagines the newly discovered Farfarout (lower right), now confirmed to be the most distant object ever observed in our solar system. Farfarout is 132 times the distance ...

Under the new definition, the astronomical unit (or AU) — the measurement used for the Earth-sun distance — is no longer always in flux, depending on the length of a day and other changing ...

Without fanfare, astronomers have redefined one of the most important distances in the Solar System. The astronomical unit (au) — the rough distance from the Earth to the Sun — has been ...

Xena is currently about 97 astronomical units from the sun (an astronomical unit is the distance between the sun and Earth), which means that it is some nine billion miles away at present.