A fresh study of the Kuiper Belt’s structure has revived that far-out question, pointing to a possible Earth-sized ...

Launched in 1977, the twin Voyager 1 and Voyager 2 spacecraft embarked on a Grand Tour of the outer solar system, a feat made ...

Jupiter's rapid early growth dramatically reshaped our solar system, scientists now reveal. Its immense gravity acted as a ...

New observations suggest that the dwarf planet Makemake is surrounded by faintly glowing methane gas. Scientists are unsure if the gas is contained within a wispy atmosphere or being ejected into ...

It’s often assumed that Earth is somehow separate from the rest of the universe. Yet changes in environments across the solar ...

Astronomers found an interstellar "tunnel" - a cosmic channel that connects our solar system to distant stars, according to a ...

Viewed from orbit, Jackass Flats — situated in southern Nevada about 65 miles northwest of Las Vegas — could easily be ...

Voyager 1 is about to go where no human-carrying spaceship has gone before. June 15, 2012— -- Fifty-five years after humans first escaped the bounds of Earth and launched a satellite into orbit, ...