Neptune is an ice giant, composed primarily of hydrogen, helium, and methane, with a hot, dense fluid of icy materials above a small rocky core. Neptune has 14 known moons and at least five main rings ...

The twin spacecraft launched in 1977 and are currently in interstellar space, or the space between stars. Voyager 1 ...

Voyager 1 crossed into interstellar space in 2012, followed by Voyager 2 in 2018, making them the only spacecraft to operate ...

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Early in our Solar System’s history, bits of icy debris were scattered and then gradually coaxed into a spiral alignment in ...

Uranus radiates more energy than it gets from the sun, two new studies find — just as Jupiter, Saturn and Neptune do.

The objects around the ringed planet are tiny, but some of them may have formed relatively recently in the solar system’s ...

Considering humans don't have a spacecraft capable of traveling to planets beyond the solar system, scientists have to get ...

You thought Saturn's 146 moons were impressive? Think again. The ringed planet's moon count has nearly doubled with the ...

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The seventh planet from the sun was first discovered on 13 March 1781 by William Herschel, a German-British astronomer.