They're called trans-Neptunian objects, or TNOs. Astronomers analyzed data from the Dark Energy Survey - which just completed 6 years of observations - to find over 100 new little worlds in the cold outer reaches of our solar system.
Astronomers using the Hubble Telescope found that the region around a quasar's black hole pushes out material at a few percent the speed of light. These quasar tsunamis wreak havoc on the galaxies in which the quasars live.
Because stars are so much brighter than their planets, we've barely begun to glimpse distant exoplanets, or planets orbiting distant stars. Now a new technology promises to provide better imaging of these potentially habitable exoworlds.
The temperatures on the day side of giant exoplanet WASP-76b are scorching, high enough for metals to be vaporized. But the night side is cooler, and winds carry an iron "rain" from the day side to the night side.
The Curiosity rover has found organic molecules called thiophenes, which, on Earth, are associated with biological systems. Are they evidence for once-living microbes on Mars?
Researchers say they've discovered the first complete proteins inside 2 meteorites. It's tantalizing, since proteins play a key role in the cells of living creatures. But will the results hold up to scrutiny?
All 4 of the gas giant planets in our solar system - Jupiter, Saturn, Uranus, and Neptune - are known to have rings. Could many of the so-called super-puff or cotton candy exoplanets have rings instead of super low densities?
Juno arrived at Jupiter in 2016. It's in a 53-day orbit around the planet. Close sweeps past the planet are called "perijoves" (peri means "near"). Here are some spectacular images from the most recent sweep, Perijove 25, in February.