The Dwarf Planet: Pluto On average, Pluto is 3.67 billion miles from the Sun-nearly 40 times farther than Earth is. Earth takes 1 year to go around the Sun. But Pluto is too far away, so it takes 248 years to go around the Sun.Even the best telescopes can't see Pluto clearly. Pl...
【题目】The Dwarf Planet:Pluto On average,Pluto is 3.67 billion miles fro m the Sun-nearly 40 times farther than Eay th is Earth takes 1 year to go around the Sy n.But Pluto is too far away,so it takes 248ears to go around the Sun Even the best telescopes can't see Pluto cl....
Like almost all of the knowndwarf planets(with the exception of Ceres), Eris lies in theKuiper Belt, which rings the outer solar system. But Eris is even farther-flung than Pluto, circling our star about three times farther away. It takes 561 years for the distant dwarf planet to make a...
This mission will provide an increased amount of information about this peculiar dwarf planet. The uniqueness of Pluto's orbit, rotational relationship with its satellite, spin axis, and light variations all give it a certain appeal. Pluto is usually farther from the Sun than any of the eight...
Plutoids A sub-section of dwarf planets was created by the I.A.U. in August 2006. All the dwarf planets except Ceres are member of this sub-group. For them to be a member of the group, they must be at the end of the Solar System, orbiting out farther than Neptune. I.A.U. 转...
Makemake is a dwarf planet in the outer solar system that is about two-thirds the size of Pluto. It is farther out than Pluto, but closer than Eris. See images (including this artist's rendering) in our gallery of Makemake here. (This slideshow was originally posted in November 2011 and...
Pluto is smaller thanthe Earth's Moonand consists of rock and ice. It has a thin atmosphere that forms when it is close to the Sun but freezes as it moves away. Pluto's orbit is tilted farther from the ecliptic, 17.2°, than that of any of the eight planets and is also very elong...
The size of Eris (2326 km diameter) is approximately the same as the dwarf planet Pluto (2372 km diameter) but positioned three times farther from the Sun. The orbital length is too long and completes one orbit in 557 Earth-days. The surface is expected to be mostly rocky, volatiles, ...
Plutoids are dwarf planets that are farther from the Sun than Neptune. All the dwarf planets except Ceres are plutoids; because of its location in the asteroid belt, Ceres is not. For a discussion of the formal conditions set out by the IAU for a body to be a dwarf planet, see ...
plutoids, members of a subcategory created by the IAU in June 2008 for dwarf planets that are farther from the Sun than Neptune. (For discussions of these categories,seeplanet.) Eris revolves once about every 560Earthyears in a highly tilted,ellipticalorbit. From its spectrum its surface ...