Scientists have finally worked out where the most common kinds of planets come from.

Jupiter will arrive at that point in the sky directly opposite to the sun, called "opposition." If all the planets' paths aroun ...

Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't ...

The two biggest planets in our Solar System in one telescope view. And catastrophe is imminent. If Jupiter and Saturn ...

Short-lived radioisotopes such as aluminum-26 influenced early solar system heat, water retention and the formation of Earth-like rocky planets, according to meteorite analyses and models.

Worlds will align for a "planetary parade" in January, with four bright and easily visible to the naked eye. But an even better view arrives in February and March. Here's what you need to know. When ...

The planets of the solar system orbit the sun in a complex and ever-shifting ballet, which can see them appear as glorious ...

The upcoming year will offer a blood-red moon, spectacular meteor showers and the first glimpse of the sun’s corona since ...

Largest Planet in the Solar System: Jupiter is the largest planet in the solar system. It is the biggest in diameter, mass, and volume, and it is so large that all the other planets could fit inside ...

The sun’s outer atmosphere resembles a pufferfish.

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between five and 18, plus hundreds of potentially undiscovered ones, depending on whom ...