Outer solar system

  • New images from the Hubble Space Telescope show that Pluto is undergoing seasonal changes. This change of seasons is evident in the surface color and brightness of the dwarf planet. The images are helping scientists understand planetary processes in our solar system, and will be
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  • A dark red spot discovered on the dwarf planet Haumea, which orbits beyond Neptune, appears to be rich in minerals and organic compounds. Studying the composition of objects like Haumea can help astrobiologists understand the inventory of compounds in our solar system that may have
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  • Catching Pluto’s Breath
    Scientists have made surprising discoveries about the atmosphere of the dwarf planet Pluto. The atmosphere contains unexpectedly large amounts of methane and is much warmer than the surface of Pluto itself.
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  • Catching Pluto's Breath
    Scientists have made surprising discoveries about the atmosphere of the dwarf planet Pluto. The atmosphere contains unexpectedly large amounts of methane and is much warmer than the surface of Pluto itself.
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  • The Perception of Pluto
    Scientists recently gathered to debate the recent IAU decision to demote Pluto from 'planet' status. Pluto may be small, but objects like Pluto still undergo important geophysical processes that can teach us about planetary formation.
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  • Renaming Pluto
    The International Astronomical Union has defined new rules for naming and categorizing dwarf planets. Those similar to Pluto and with orbits beyond Neptune will now be named 'plutoids'.
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  • The Solar System’s Ice Machine
    Frigid geysers may be spewing material up through cracks in Charon and coating parts of its surface in ice crystals. The new observations suggest that liquid water might actually persist deep below the ultra-cold surface of Charon.
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  • The Solar System's Ice Machine
    Frigid geysers may be spewing material up through cracks in Charon and coating parts of its surface in ice crystals. The new observations suggest that liquid water might actually persist deep below the ultra-cold surface of Charon.
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  • Eris Outweighs Pluto
    Astronomers have discovered that the dwarf planet Eris is more massive than Pluto, and is likely composed of rock and ice. Objects in this little-known region of space, known as the Kuiper Belt, are important relics of the early Solar System and can teach us
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  • Speeding by Jupiter
    The New Horizons spacecraft has collected new data on the Jupiter system, providing new views of the giant planet's atmosphere, rings, moons and magnetosphere.
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