Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

The Sun, an ever-burning ball of gas at the center of our solar system, has always fascinated people. But now, scientists are ...

Almost everything you could want to know about the closest planet to the Sun, Mercury. Real HD photos and videos taken by the ...

Astronomers have discovered a new exoplanet that may be habitable 35 light-years from Earth. Named L 98-59 f, it joins four ...

The newly discovered world — a "sednoid" — challenges what planetary scientists thought they knew about the edge of the solar ...

Nearly a month ago, a mysterious object was seen hurtling through the solar system and later confirmed as an interstellar ...

The action is unfolding in a location comparable to the asteroid belt between Mars and Jupiter containing the leftover building blocks of our solar system’s planets.

Astronomers have discovered the earliest seeds of rocky planets forming around a baby sun-like star, a peek into the dawn of our own solar system.

These findings point toward the birthplaces of future planetary systems. A new window into the early stages of solar system formation has opened with the discovery of planet-forming ‘pebbles’ ...

An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed.

An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed. The object -- likely a comet -- was first detected in data collected between by ...