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Dwarf Planets and New Planets, Oh My!

Just about the time that one NASA spacecraft is closing in on Ceres (formerly known as an asteroid, now semi-officially designated as a dwarf planet) and another nears its encounter with Pluto, a group of astronomers has suggested that there

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Posted in Planets, Spacecraft

Pluto’s Fifth Moon

Poor little Pluto! Every third-grader’s favorite planet got officially downgraded to a “dwarf planet” in 2006, and nothing’s been the same since. Although planetary scientists have known for more than 20 years that Pluto is just one of the larger

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Posted in Planets, Solar System, Spacecraft

Pluto Has A New Moon

…which now makes four and counting. The new discovery comes via an eight-minute exposure (long in this context) of Pluto and its environs with the Hubble Space Telescope. Here is an image that may be a little different from what

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Posted in Planets, Solar System