The four rocky planets�Mercury, Venus,
Earth, and Mars�consist of solid rock,
some with shallow atmospheres. The gas :
giants Jupiter and Saturn have small : _-@
rocky cores surrounded by thick layers GPE
e of gas. Uranus and Neptune are similar,
but they are mostly frozen because they
are so far from the hot Sun.
METEORITES DWARF PLANETS
The meteorites that land on Earth range a Astronomers have named five rocky objects
as
from small pebbles to truck-sized or ; ie te. dwarf planets: Ceres, Pluto, Haumea,
Makemake,
even larger chunks of space rock. ~ and Eris. Although they are smaller than the
eight
soimie are TRUTES OH (Dek ane Iran major planets, they are larger than the
thousands
that formed before the Solar
System. Others are parts of
shattered planets. This one
came from the Moon.
of other tiny worlds in the Solar System. Pluto has
a moon called Charon, which is almost half the
size of Pluto�the two orbit each other like twins,
as seen in this distant view from Earth.