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 It is the hottest star. All the planets rotate
around the sun. Years ago people
thought that all of the planets, including
the sun, revolved around the Earth.
 Astronomers once thought that planetary
orbits were circular and that the sun was
in the center. Kepler showed that the
orbits are elliptical. The sun is not at the
center but slightly to one side.
 Mercury is the planet
closest to the sun.
The surface is rocky
with craters. In sunlit
areas the surface is
hot enough to melt
lead. It is one of the
inner planets.
 The diameter is about 3,031 miles. There
could be no life on this planet because it
is to hot. Mercury does not have any
moons. Mercury is 58 million km from the
sun.
 Venus doesn’t have
any moons. Venus’
surface is rocky. An
interesting fact about
Venus is that it
rotates backward
compared with other
planets.
 Venus’ diameter is about 7,519 miles.
The atmosphere of Venus is thick, mostly
carbon dioxide and nitrogen, heavy
enough to crush humans.
 Earth is the only
planet with life. The
surface is mostly
water, with areas of
soil-covered rock.
The atmosphere is
mostly nitrogen and
oxygen.
 Earth’s diameter is
about 7,926 miles.
Earth’s distance from
the sun is 150 million
km from the sun.
Earth is one of the
inner planets.
 Earth tilts on its axis.
 Mars’ surface is
rocky and covered
with dust.
 Mars has the solar
system’s largest
volcano, Olympus
Mons, whose base is
larger than the state
of New Mexico.
Mars diameter is about
4,217 miles. The
atmosphere is mostly
carbon dioxide.
Scientists use a tiny
remote-controlled
vehicle called a
rover. The distance
from the sun is 228
million km.
 Jupiter is 778 million
km from the sun.
 Jupiter has a ring
around it.
 It is one of the gas
planets.
 It is mostly hydrogen
and helium.
 Jupiter’s diameter is
about 4,217 miles.
 The Great Red Spot
on Jupiter is a huge
storm that has lasted
at least since the
time of Galileo.
Saturn is the 6th
planet.
Saturn’s diameter is
about 74,900 miles.
Its distance from the
sun is 1,424 km.
Its atmosphere is
mostly hydrogen and
helium.
 An interesting fact
about Saturn is that it
has a wide, thin
system of rings made
of small pieces of
rock and ice.
 Saturn’s surface is
gaseous with no
known solid surface.
 Uranus’ diameter is
about 31,758 miles.
 Its’ distance from the
sun is 2,867 million.
 Uranus has 17
moons.
 Uranus’ atmosphere
is mainly hydrogen
and helium.
 The surface of
Uranus is gaseous
with no known solid
surface. An
interesting fact about
Uranus is A possible
collision with an
Earth-sized object
may have knocked
Uranus on its side.
 Neptune’s diameter
is about 30,782
miles.
 The distance from
the sun is 4,488
million km.
 Neptune has 8
moons.
 The surface of
Neptune is gaseous
with no known solid
surface.
 The atmosphere is
mostly hydrogen,
helium, and
methane.
 Pluto’s diameter is about
1,460 miles.
 The distance from the
sun is about 5,909
million km.
 An interesting fact about
Pluto is that it is the ninth
planet, but part of its
orbit is inside the orbit of
Neptune making Pluto
the 8th planet.
 Pluto’s surface is
water and methane
ice.
 The atmosphere is
mostly methane.
 Pluto has one moon.
 Pluto is the smallest
planet.
 There are nine
planets in the Solar
System.
 These are the
planets in order,
Mercury, Venus,
Earth, Mars, Jupiter,
Saturn, Uranus,
Neptune, and Pluto.
 That is the end of our show.