When the Sun becomes a red giant, will the outer planets and moons become more temperate and conducive to Earth-like life? Terrence A. Murray Cincinnati, Ohio When the Sun runs out of hydrogen fuel ...

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new ...

A NASA Hubble Space Telescope observation program called OPAL (Outer Planet Atmospheres Legacy) obtains long-term baseline observations of Jupiter, Saturn, Uranus, and Neptune in order to ...

In searching for the elusive Planet Nine, researchers instead turned up a different resident in our cosmic backyard.

The researches say that the Hycean Habitable Zone (HHZ), when compared to the terrestrial habitable zone, may include smaller ...

A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the orbits of the four outer planets, a new study suggests.

Of the outer planets, Pluto is the slowest-moving, staying in one sign from 12 to 31 years due to its elliptical orbit. This makes this planet a symbol of transformation and power dynamics ...

Reaching the outer planets with a spacecraft is difficult because these worlds are so far away, billions of miles, and would take decades to reach. However, ...

NASA artist’s conception of a brown dwarf (main) and stock image of the planets in the solar system (inset). An object between 2 and 50 times the mass of Jupiter may have flown through our ...

Killer Spacemen from Outer Planet X. Special | 16m 40s Video has Closed Captions | CC. Three space explorers search for fuel when they encounter Killer Spacemen from Outer Planet X!

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 ...