Astrophysicists are mapping a vast, hidden structure in space that appears to guide matter and radiation along a kind of interstellar highway stretching from our solar neighborhood to distant stars.

Add Yahoo as a preferred source to see more of our stories on Google. A newly discovered object speeding through our solar system is sparking excitement among astronomers because it’s not from around ...

Add Yahoo as a preferred source to see more of our stories on Google. The Oort Cloud, an expanse of icy bodies in the far reaches of our solar system, is shown here in a scene from "Encounters in the ...

A NASA mission to study the heliosphere—the sun's magnetic bubble that shields our solar system—and develop a better understanding of space weather was launched from the agency's Kennedy Space Center ...

Solar wind sounds poetic, but it's a very real and powerful phenomenon, connecting the Sun to every part of our solar system.

A new analysis estimates that the asteroid belt is steadily losing mass each year, and may not be as permanent a feature of the solar system as we thought. When you purchase through links on our site, ...

Nothing manmade has reached further from Earth than the Voyager series of spacecraft. Hurtling away from the sun at 38,000 miles an hour, the duo have now traveled over 12 billion miles, with Voyager ...

A newly discovered object speeding through our solar system is sparking excitement among astronomers because it’s not from around here. Believed to be a comet, the object is only the third celestial ...