The Oort cloud is a shell of icy bodies that surrounds the solar system. Many comets that frequent our inner solar system originate from this distant region.

The Oort cloud, if it indeed exists, likely isn’t unique to our own solar system. Correa Otto says that some astronomers believe these clouds exist around many solar systems.

The monstrous 85-mile-wide comet C/2014 UN271 is the second most distant body originating from the Oort Cloud found to be ...

Stretching nearly a light-year from the Sun, the Oort Cloud serves as a cosmic reservoir of ancient material left over from the solar system’s formation over 4.5 billion years ago.

Astronomers have discovered a new interstellar comet passing through our solar system, marking the third interstellar object ...

The Oort cloud is thought to be a remnant of the solar system’s formation, a shell of icy debris left over from the chaotic ...

As such, it seems the Oort cloud is more of a shell or bubble around our solar system than a disk like the Kuiper Belt. These long-period comets include C/2013 A1 Siding Spring, which passed close to ...

Scientists have unlocked one of the solar system's many secrets from an unexpected source: a planetarium show.

“It’s completely plausible for our solar system to have captured such an Oort cloud planet,” says Nathan Kaib, a co-author on the new work and an astronomer at the Planetary Science Institute.

The Oort cloud spans a great distance, from around 2,000 to between 100,000 and 200,000 astronomical units (au). For reference, 1 au is equivalent to nearly 150 million kilometers (93 million miles), ...

You’ll find it in every astronomy textbook: the spherical cloud of a trillion lumps of rock and ice that forms the outermost boundary of our solar system.The Oort cloud’s distant edge could ...

The Oort cloud is a region in our solar system's vicinity we don’t know all that much about. Named after Dutch astronomer Jan Oort, it is a theoretical concept comprising planetesimals ...