A distant comet trapped in orbit between Saturn and Uranus is accompanied by a transforming disk of icy dust, new observations reveal.
If dark matter is made from "dark" versions of the basic building blocks of ordinary matter, the world's largest particle accelerator should be able to pin it down, a new study suggests.
A supernova, pinpointed by amateur astronomers, could reveal unexpected new steps in the deaths of massive stars.
This supernova signaled the explosive death of a supergiant star in the nearby Large Magellanic Cloud.
China's presumed-dead Zhurong rover spotted telltale patterns of ancient climate change in the Martian dunes.
The gravity of a galaxy two-and-a-half billion light-years away has acted like a cosmic magnifying glass to amplify the light of a distant exploding white dwarf.
A polar cyclone is swirling on Uranus, further showing that the planet's atmosphere is a hive of hidden activity.