Modern astronomy is giving us unprecedented views of the asteroids, comets, and other small bodies that litter our cosmic ...

Astronomers are investigating a potential hidden planet, dubbed Planet Y, far beyond Neptune. Its gravitational pull is suspected to be causing unusua ...

A newly discovered warp in the outer Solar System may have been created by a small, rocky world, much closer to the Sun than ...

Our solar system now, once again, officially consists of only eight planets. Although largely debunked, speculation continued ...

The Japanese Aerospace Exploration Agency's Akatsuki mission orbiting Venus was declared dead last week after engineers spent more than a year trying to get in touch with the sile ...

Over the past seven decades, thousands of sophisticated spacecraft have been launched on ambitious missions to look down on ...

For nearly five decades, NASA’s Voyager 1 and 2 spacecraft have ventured farther than any other human-made object, pushing ...

Astronomers have identified a small but significant possibility that a Neptune-sized planet is quietly orbiting within the ...

Last month, Google quietly killed off Google Sky Maps. But there’s still another way to virtually explore most of the solar system a la Google Maps: it’s called Google Maps in Space. Google Maps in ...

Anyone who studies planetary formation would relish the opportunity to get a close-up look at an interstellar object. Sending a mission to one would undoubtedly yield a scientific payoff. There’s a ...

Two bright green comets streamed through the skies this month and were visible to skygazers in the Northern Hemisphere, ...

Two bright green comets are streaming through the skies and are visible to skygazers in the Northern Hemisphere. Both hail ...