Located around 30 times as far from the Sun as Earth, Neptune is not visible to the naked eye. The planet's blue color comes from methane in its atmosphere, which absorbs red wavelengths of light.

When it came to discovering Neptune, scientists didn’t need to see to believe. The eighth planet in our solar system was ...

Surface features of Uranus' icy moon Miranda point to the existence of a once deep ocean, one that still may exist today.

Voyager 2 preceded it into space by 16 days, but Voyager 1 quickly overtook it on a faster trajectory, and arrived at Jupiter 4 months before its sister craft. Voyager 1 took this photo of Jupiter ...

The Voyager 2 spacecraft’s energy budget keeps dropping by about 4 Watt/year, as the plutonium in its nuclear power source is steadily dropping as the isotope decays. With 4 Watt of power less ...

NASA reconnected with Voyager 1, which is located nearly 15 billion miles away from Earth, after a brief pause that triggered ...

New insights from Voyager 2 suggest Uranus' moon Miranda may have housed a deep ocean, shaping its unique features.

Voyager 2, as well as other spacecraft exploring our solar system. Voyager 1 then sends back engineering data to show how it is responding to the commands. It takes about 23 hours for a message to ...

One thing is for sure, though: Voyager 1 and Voyager 2 are both slowly dying, instrument by instrument, and each new issue that crops up has every potential to be their last. Josh Hawkins has been ...