ChatterBank1 min ago
Solar System
Answers
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For more on marking an answer as the "Best Answer", please visit our FAQ.In addition to Q's offering for the names of the planets, here's a couple relating to their sizes:
Largest to smallest:
Jason Sat Under Ninety Eight Vicious Monster Munching Penguins
Smallest to largest:
Pete's Mother made Val's Elephant Nestle Under Sam's Jump
And... yes, Pluto is still considered a planet, while The newly discovered object 2003UB313 has a good chance of eventually being classified as a planet but that decision has not yet been made. It is contentious and it may be several years before a decision is made.
This new planet is the largest object found in orbit around the sun since the discovery of Neptune and its moon Triton in 1846. It is larger than Pluto, discovered in 1930. Like Pluto, the new planet is a member of the Kuiper belt, a swarm of icy bodies beyond Neptune in orbit around the sun. Until this discovery Pluto was frequently described as "the largest Kuiper belt object" in addition to being called a planet. Pluto is now the second largest Kuiper belt object, while this is the largest currently known.
Where is it? The new planet is the most distant object ever seen in orbit around the sun, even more distant than Sedna, the planetoid discovered almost 2 years ago. It is almost 10 billion miles from the sun and more than 3 times more distant than the next closest planet, Pluto and takes more than twice as long to orbit the sun as Pluto.
The orbit of the new planet is even more eccentric than that of Pluto. Pluto moves from 30 to 50 times the sun-earth distance over its 250 year orbit, while the new planet moves from 38 to 97 times the sun-earth distance over its 560 year orbit. (Thanks to: Mike Brown (Caltech), Chad Trujillo (Gemini Observatory), and David Rabinowitz (Yale University).