Outer solar system

  • With some clever science, astronomers have re-examined data archives from the Hubble Space Telescope and discovered 14 new trans-Neptunian objects. These objects rest beyond the orbit of Neptune and can teach us a great deal about the history of the Solar System and the materials
    more...
  • The Voyager 2 spacecraft, launched in 1977, is now having problems talking to Earth. Engineers are trying to figure out how to resume normal communications with this envoy at the edge of the solar system.
    more...
  • New research indicates that there may be many more dwarf planets similar to Pluto in our solar system than previously thought. Studying these distant objects can help astrobiologists understand the basic properties of our solar system and the effects that dwarf planets might have on
    more...
  • The first ever infrared analysis of the atmosphere of Neptune's moon Triton has shown that summer is in full swing in its southern hemisphere. Observations revealed season variations in carbon monoxide and methane in the moon's thin atmosphere.
    more...
  • 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
    more...
  • 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
    more...
  • 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.
    more...
  • 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.
    more...
  • 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.
    more...
  • 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'.
    more...