Mercury has no atmosphere. This means there is no air.

Mercury is a planet of extreme temperatures. During the day, temperatures can reach over 800° F. At night the temperatures can drop to almost 300° F.

A year on Mercury is only 88 Earth days. One day is only 59 Earth days.

Although it is farther from the Sun than Mercury, Venus is even hotter. Temperatures can climb up to 900° F.

A year on Venus is 225 Earth-days long. One day is 243 Earth-days long.

You can find Venus shining in the western sky at night.

Earth is the only planet with air we can breathe.

From space Earth looks like a ball covered with white clouds.

Earth is the only planet with plants and animals.

A year on Mars is 687 Earth-days long.

Mars has 2 moons. Mars does NOT

have an atmosphere.

Jupiter has 16 moons that we know of.

Jupiter is twice as large as the other 8 planets put together.

If Jupiter were hollow more than 1,000 planets the size of Earth could fit inside it .

Saturn has at least 18 moons.

Saturn was the first known planet.

Saturn is about 10 times as large as Earth.

A man weighing 150 pounds on Earth would weigh 162 pounds on Uranus.

Uranus has 5 large moons and 10 small moons.

A year on Uranus is 84 Earth-years long. A day is 17 Earth-hours.

Neptune looks like a twin of Uranus.

Neptune is a large blue- green ball of gas with a center of rock and iron.

Neptune’s color comes from a gas called methane.

Pluto is different from the other 8 planets.

Pluto is the smallest planet. It is smaller than our moon.

Pluto is also the coldest spot in the solar system.