Pluto's looking pretty happy. Apparently he didn't get the news. He's been kicked out.
What? Ohhhhhh. That Pluto.
PRAGUE, Czech Republic (AP) -- Leading astronomers declared Thursday that Pluto is no longer a planet under historic new guidelines that downsize the solar system from nine planets to eight.
For now, membership will be restricted to the eight "classical" planets in the solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
Much-maligned Pluto doesn't make the grade under the new rules for a planet: "a celestial body that is in orbit around the sun, has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a ... nearly round shape, and has cleared the neighborhood around its orbit."
Pluto is automatically disqualified because its oblong orbit overlaps with Neptune's.Instead, it will be reclassified in a new category of "dwarf planets," similar to what long have been termed "minor planets.
Can you name the planets (including or excluding Pluto)?
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto