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Persistent tremors on Mars suggest the planet’s interior is cooling and hint that there might be a pocket of magma beneath the surface.
New Horizon’s flyby of Arrokoth, a planetesimal in the Kuiper Belt, reveals a pristine object untouched since the solar system’s origin. Its shape and geology show that planetesimals form more gently than previously thought.
Scientists release a bevy of results from the Parker Solar Probe's first two passes near the Sun, including new details on so-called "rogue waves" in the solar wind.
What do we know about the second object to visit us from another stellar system? Detailed Hubble images have given us plenty to consider!
New computer simulations suggest that the "beating" of Pluto's frozen heart drives weak winds on this remote world in the outer solar system.