Trans-Neptunian objects (TNO) are some of our solar system's lesser-known objects. They number in the thousands, and they get ...

CAPE CANAVERAL, Fla. — Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby ...

What color is moonlight typically, and what other colors can moonlight look like from our perspective on Earth?

Have an out of this world coloring pages with our free planet coloring pages. We have a bonus space coloring pages, and free coloring sheets for the sun and moon as well!

Mars isn’t a bright, fire-engine red, but the iron oxide in its rocks makes it appear redder than other planets, especially from afar.

Think of our solar system like a big family. The Sun is the parent, and the eight planets are like siblings. Each planet is unique, just like how every person in a family is different.

The James Webb telescope has made another stunning discovery -- this time of a massive planet that could potentially sustain ...

– Gavriel, age 10, Paducah, Kentucky A cloud of collapsing gas created our Sun, the first thing to form in our solar system. This happened about 4½ billion years ago.

We might be wrong about the color of Mars, scientists say Red dust has blown around the planet for billions of years, leading to its iconic hue ...

Instead, our planet’s impending doom is actually set to happen billions of years from now, long after we’re all gone, when the oxygen levels drop and life as we know it ceases to exist.

'Temperamental' stars that brighten and dim over a matter of hours or days may be distorting our view of thousands of distant planets, suggests a new study.

Neptune has long been depicted as a deeper, darker blue than its fellow ice giant Uranus, but a new study shows that both are a similar shade of light greenish blue.