Why was Pluto reclassified as a dwarf planet? One might think that it’s purely a matter of size. Mercury, the smallest of the ...

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A surprising chemical difference between Pluto and Sedna, another dwarf planet in the distant Kuiper Belt, is helping scientists nail down their respective masses, a new study reports. The Kuiper ...

Forbes contributors publish independent expert analyses and insights. Jamie Carter is an award-winning reporter who covers the night sky.

Sky gazers across the U.S. will have ... system's ninth planet until it was redefined as a "dwarf planet," in 2006, don't get your hopes up. Pluto will be below the horizon during the parade ...

You may recall that Pluto was reclassified as a dwarf planet in 2006 by the International ... ensuring a darker sky for better visibility. Plus, it's nearing the New Moon phase making the sky ...

It's not often that planets align in the night sky. Attention ... are also five additional celestial bodies called dwarf planets, including Pluto, Ceres, Eris, Haumea and Makemake.

Seven planets aligned in the night sky on Friday, Feb. 28 ... In 2006, the International Astronomical Union (IAS) reclassified Pluto as a dwarf planet. That decision came several years after ...

We float through space revolving around the Sun along with seven other planets and five dwarf planets—including Pluto, which was ... brightly in the night sky. For the entire month of February ...

Sky gazers across the U.S. will have ... system's ninth planet until it was redefined as a "dwarf planet," in 2006, don't get your hopes up. Pluto will be below the horizon during the parade ...