A swarm of interplanetary dust, rocks, comets and asteroids thought to be responsible for two famous impacts here on Earth has been found to be not quite as menacing as astronomers had feared.

Astronomy has always captured humanity’s imagination with countless mysteries lurking in the vast cosmic expanse. Among these enigmas one star in particular defies the norms ... Read more The post The ...

"We were quite surprised," Dones continued. "Spirals are seen in Saturn's rings, disks around young stars and galaxies. The ...

Since then, scientists have been trying to figure out what that something might be. A swarm of comets flying by, en masse? An alien megastructure? Then, in 2019, a team of astrophysicists proposed ...

a swarm of icy debris beyond the orbit of Neptune, during the infancy of our solar system. "Occasionally a comet comes in close to the sun and starts to vaporize," said team scientist Saavik Ford.

Far beyond Pluto, trillions of cold comets circle the sun in a lazy swarm called the Oort Cloud. A new simulation indicates what this comet-cloud looks like: a loose spiral that resembles a ...