Seafloor sediments provided new evidence that a 2.4 million-year-long resonance between Mars and Earth affects long-term changes in ocean currents and temps.
A new analysis of data from NASA's New Horizons mission shows Pluto's ocean is just a little denser than seawater on Earth. You could easily float in it.
Why does the puffy exoplanet WASP-107 b have a density similar to a marshmallow? New findings from Webb show it is hot on the inside due to tidal heating.
Astronomers have discovered a new Earth-sized exoplanet orbiting the ultracool dwarf star SPECULOOS-3. But any atmosphere it had is probably long gone.
NASA has released some images of Europa, the ocean moon of Jupiter. They provide new clues about the moon's ice shell and other intriguing surface features.
Researchers said the bunching of small objects beyond Neptune fits perfectly with the existence of a Planet 9 hiding on the outskirts of our solar system.