From the northern lights ringing in the New Year to a spectacular meteor shower, January is shaping up to be an exciting ...

If Brown’s hidden world is real, Rubin will almost certainly find it or strong indirect evidence that it exists. “In the ...

Encountering Neptune in 1989, NASA's Voyager mission completed humankind's first close-up exploration of the four giant outer planets of our solar system. Collectively, since their launch in 1977 ...

When the Voyagers set off from Earth, they did so with the aim of exploring what now looks like the relatively nearby planets of the outer solar system. Within a couple of years, they had visited ...

This is a montage of Hubble Space Telescope views of our solar system's four giant outer planets: Jupiter, Saturn, Uranus, and Neptune, each shown in enhanced color. The images were taken over ...

Is there an unseen planet — a "planet X" or "Planet Nine" — in the outer solar system? That possibility is supported by calculations in a new study that shows the hypothetical planet could ...

New studies led by researchers at the University of Central Florida offer for the first time a clearer picture of how the ...