is the third-largest known dwarf planet
in the Solar System
and one of the two largest Kuiper belt
objects (KBO) in the classical KBO
population. Its diameter is roughly three-quarters that of Pluto
. Makemake has no known satellites, which makes it unique among the largest KBOs. Its extremely low average temperature (about 30 K
) means its surface is covered with methane
and possibly nitrogen ices. Initially known as 2005 FY9
(and later given the minor planet number
136472), it was discovered on March 31, 2005, by a team led by Michael Brown
, and announced on July 29, 2005. On June 11, 2008, the IAU
included Makemake in its list of potential candidates to be given "plutoid
" status, a term for dwarf planets beyond the orbit of Neptune
that would place the object alongside Pluto and Eris
. Makemake was formally classified as a plutoid in July 2008.
Jupiter is the fifth planet from the Sun and by far the largest within the Solar System. It is 318 times more massive than Earth, with a diameter 11 times that of Earth, and with a volume 1300 times that of Earth. Its best known feature is the Great Red Spot, a storm larger than Earth, which was first observed by Galileo four centuries ago. This picture, taken by the Cassini orbiter was one of 26 thousand images taken of Jupiter during the course of its flyby and is the most detailed global color portrait of the planet ever produced.