New research shows stellar flybys are common in our galaxy’s crowded center. That could have both good and bad (but mostly bad) effects on growing planets.
The shadow cast by a protoplanetary disk takes the shape of a bat — and over time, flaps like one, too. The eery shadow could help astronomers understand the planet-forming material inside the disk.
When NASA's New Horizons flew by a distant Kuiper Belt Object on New Year's Day, they nicknamed it "Ultima Thule." Now, the object has received an official moniker: Arrokoth.
The solar system's newest interstellar visitor, Comet 2I/Borisov, bears a striking resemblance to the icy population of the outer solar system.
Coastal waves from mid-sized asteroid impacts might be more like a storm surge than a wall of watery destruction, according to NASA experiments with paintballs.