When we have five or more planets filing into a small sky area, an alignment is upgraded to parade status. Parade is not an ...

Back in 2006 our Solar System lost a planet, not because it disappeared, but because it was reclassified. Pluto, now considered a dwarf planet, failed one of the three tests the International ...

In 2006, the International Astronomical Union reclassified Pluto as a dwarf planet because it doesn't meet all the criteria for full planet status. Pluto was discovered 95 years ago on Feb. 18 ...

The International Astronomical Union reclassified Pluto as a dwarf planet because it does not clear its orbit of other debris. Pluto was the little planet that could — until it couldn’t.

Pluto was last and least of them. An icy dwarf only half the size of the United States, it was on average 3.7 billion miles from the sun. It also has a decidedly strange orbit that was highly ...

It takes Pluto slightly over 248 Earth years to orbit the sun, which means that on March 23, 2178, one Plutonian year will have elapsed since the dwarf planet was first spotted, on Feb. 18 ...

Pluto failed to meet that third criterion, so it was reclassified as a “dwarf planet” on Aug. 24, 2007. Critics point out that by that criterion, the Earth is also not a planet: We constantly ...

To spot dwarf planets, you would need a telescope with at least an eight-inch aperture. But for serious observations, larger apertures and high-quality eyepieces are a must. Plus, equatorial mounts ...

It takes Pluto slightly over 248 Earth years to orbit the sun, which means that on March 23, 2178, one Plutonian year will have elapsed since the dwarf planet was first spotted, on Feb. 18, 1930.

As a result, Pluto was reclassified as a “dwarf planet,” sparking debates among stargazers still hoping for its comeback. Pluto was reclassified from a planet to a dwarf planet by the ...