planets
Astronomers have been surprised to see a huge shadow sweeping across a disk of dust and gas encircling a nearby star, and incredibly, it takes 16 years for just one rotation.
Astrophysicists can now explore weather systems on distant planets orbiting other suns.
"Let these images -- and those to come -- remind you that we've lived a bold and daring adventure around the solar system's most magnificent planet."
"All of these Cassini mission measurements are changing our view of the Saturnian system, as it turns our old theories upside down."
"Machine learning offers a powerful way to tackle a problem in astrophysics, and that's predicting whether planetary systems are stable."
The model also suggests that the properties of Sputnik Planitia may hint at the presence of a subsurface ocean on Pluto.
A newly discovered giant valley on the planet Mercury makes the Grand Canyon look tiny by comparison.
"This image captures the wonder of soaring above this fascinating, unique world that Dawn is the first to explore."