New analysis shows that Comet 2I/Borisov, which zipped nearest the Sun in late 2019, was unlike any comet we’ve seen before.
"Flakes" coming off the Great Red Spot have had some wondering if this epic storm is coming to an end. But observations and computer modeling show it's only getting stronger.
A new study suggests that by 3 billion years ago, most of the Red Planet’s water was locked away in minerals, and it has stayed there ever since.
A new study estimates the number of interstellar objects that fly through the inner solar system every year, and it could be quite a lot.
New simulations have identified the Karma family of asteroids in the main belt as a potential source of near-Earth asteroids.
Much of the solar system’s interplanetary dust — seen as zodiacal light from Earth — might come from Mars.
Scientists have made a new and improved map of possible water-ice reservoirs on Mars.
Two studies of the Martian atmosphere are changing the way we think about its current climate and its ancient past.
Astronomers are using tree rings as a historical record of solar activity — and they've found that the Sun was much more active in the past.