Your odds of winning the lottery are still 100,000 times larger than the probability of either Voyager hitting a comet.

David Jewitt at the University of California, Los Angeles, and his colleagues studied images from ground-based and ...

This spacecraft was the farthest human-made object from Earth, and it will reach the Oort Cloud, a hypothetical region in ...

The Oort Cloud is a vast, icy shell that surrounds the solar system, marking the farthest reaches of our cosmic neighborhood. Though we have yet to directly observe its objects, the Oort Cloud is ...

The existence of the Oort Cloud was first proposed in 1950 by Dutch astronomer Jan Oort, who imagined it as a shell of icy bodies swirling around the sun from up to 1.5 light-years away.

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.

Learn about the interstellar comet 3I/ATLAS, a high-velocity visitor from another star system. Learn how NASA is tracking its ...

The Oort cloud could stretch as far as a lightyear away from our sun. Like the name suggests, the Oort cloud is kind of cloudy, and surrounds our solar system like a wide but tenuous shell.

While the dwarf planet is incredibly far out, it’s still not far enough to be part of the Oort cloud, a hypothesized cloud of icy debris that surrounds the solar system’s disc in a spherical ...

New Oort Cloud comets are discovered all the time, a dozen or so per year in recent years. The odds of any of them colliding with Earth are extremely low. But it is possible.