Eight years after being reduced to a "dwarf planet" by the International Astronomical Union in 2006, our far distant cousin is finally getting some real push to be upgraded back to the ninth "planet" ...

Astronomers using the Hubble Space Telescope have observed a white dwarf – a highly compact stellar ember – that appears to have gobbled up an icy world akin to the dwarf planet Pluto, a finding with ...

Summer in Prague -- The great Pluto debate and the great Pluto debaters -- Contentious planets : the early history of planetary disputes -- Ceres and theories : the search for planets begins -- ...