Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond ...

The unusual orbit of a possible dwarf planet, known as 2017 OF201, makes it less likely that our solar system contains a ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, researchers say.

WD 1856+534b—a freezing world with a surface temperature of -125 degrees Fahrenheit—exists where planets are normally scoured ...

"Milky Way season," when the galaxy's bright center becomes easier to see from Earth, typically runs from February to October, according to Milky Way photography website Capture the Atlas. However, ...

The most famous and largest of these dwarf galaxy satellites of the Milky Way are the Large Magellanic ... the ordinary matter that composes stars, planets, moons and us. And, well, if it does ...

Small companion galaxies around our neighboring Andromeda galaxy appear to stretch and point toward Earth in a fascinating ...

Over the past decade or so, astronomers have speculated about the characteristics of rogue planets in the Milky Way galaxy. These "free-floating" worlds don't orbit stars, but instead roam the ...

“When the dwarf galaxy Sagittarius passed the Milky Way it created wave motions in our galaxy, a little bit like when a stone is dropped into a pond.” McMillan and coauthors used the Gaia data ...

Astronomers have discovered a rare in-sync solar system with six planets moving like a grand ... can help explain how solar systems across the Milky Way galaxy came to be. This one is 100 light ...