Interstellar objects may dominated the Oort Cloud, according to two scientists from Harvard. Their calculations are based on the interstellar comet Borisov.

Nuclear fusion ignition was triggered in a lab for the first time, and it could lead the way to clean energy and insights into the Big Bang.

NASA's Terra satellite caught images of streamers of smoke from late summer 2021 fires in California during its 115,254th orbit of Earth.

Scientists have found evidence that fragments of Ceres' icy crust are sitting on the surface of the dwarf planet. They were exposed by impacts from asteroids or other rocky debris. For scientists, the finding provides new clues about the interior and evolution of this enigmatic world.

Comet ATLAS was seen to break apart in 2020, while still relatively far from the sun. An astronomer thinks our early ancestors saw this comet.

A common halo around the sun or moon has a radius of 22 degrees. It's called a 22-degree halo. But here's a rare lunar halo: an odd-radius halo.

Huge rings of dust were discovered by astronomers around the black hole V404 Cygni in 2015. The rings are only visible in X-ray images.

Astronaut hopefuls are being asked for their patience as ESA processes over 23,000 applications to its astronaut recruitment; a number that far exceeds the agency’s most optimistic forecasts.

Unexpected Perseid outburst on August 14, 2021. Automatic all-sky cameras caught it, and observers in Wyoming, USA and Ontario, Canada made visual observations.

Blockchains work like DNA, says a new study. Its instructions are replicated across thousands of "nodes," much as DNA is replicated in cells.