The Hubble Space Telescope has captured the best picture yet of a high-speed comet visiting our solar system from another star.

The superclouds probably produce star-forming clouds of gas, since most nearby stellar nurseries are located within the giants.

Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the discovery of Pluto in the 1930s. Labeled as planet X, prominent ...

The Solar System, home to Earth and countless other fascinating planets and moons, exists within the Milky Way galaxy. But exactly where are we in this vast galaxy? The Milky Way is a massive ...

Comet 3I/ATLAS was first identified by the Asteroid Terrestrial-impact Last Alert System (ATLAS), a global network of four robotic telescopes located in Hawaii, Chile, and South Africa. ATLAS ...

Some of these flecks are even older than the Solar System itself—the presolar grains in the Murchison meteorite, for instance, go back 7 billion years.

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

Astronomers witness dawn of new solar system for 1st time Scientists were able to see the moment when planets began to form around a star.

International astronomers have for the first time witnessed the birth of a planetary system beyond Earth's sun that could one day resemble our own.

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's not aliens.) ...

The new interstellar comet's official name is 3I/ATLAS. It's officially the third known interstellar object to pass through our solar system, and it poses no threat to Earth.