Pluto's Unnamed Moons Given Names by IAU

Two newly discovered moons orbiting Pluto have been given official names by the International Astronomical Union. Image Credit: NASA / STSci

Two of Pluto’s small moons, previously known just as P4 and P5, have been given official names by the International Astronomical Union (IAU). Pluto is the god of the underworld in classical […]

Undiscovered Country: Of New Horizons and the Kuiper Belt

Neptune’s largest moon, Triton, seen here in an image from the Voyager 2 flyby, is thought to be a captured Kuiper Belt Object. Photo Credit: NASA.

Starting at about the orbit of Neptune and stretching out to roughly 50 astronomical units (1 AU = Earth-Sun distance), or 7.5 billion kilometers from the Sun, […]

Astronomy at the High Frontier

Hubble Space Telescope, as seen from the Shuttle Atlantis during the fourth servicing mission in May 2009. Photo Credit: NASA

The atmosphere is a problem for astronomers for two big reasons: it’s turbulent, so it smears out the light from cosmic objects, and it blocks out huge swathes of the electromagnetic spectrum. To […]

What Will We Find At Pluto?

NASA’s first mission to the dwarf planet Pluto is two years away from its destination. Image Credit: NASA, ESA, and M. Buie Southwest Research Institute

Something odd happened a few months after NASA’s deep space probe New Horizons was launched Jan. 19, 2006—its target got demoted from a planet to a “dwarf planet.” […]