Unlike other planets, Jupiter sends out a strong radio radiation that can be detected on Earth.

Jupiter has the biggest moon in the Solar System, Ganymede. It is even bigger than Mercury and Pluto.

The great red spot on Jupiter is a storm that has been going on for over 300 years.

Jupiter's volume is large enough to contain 1,300 planets the size of Earth.

The mass of Jupiter is 70% of the total mass of all the other planets in our Solar System.

Jupiter has a mass 318 times greater than the Earth's and a diameter that is 11 times larger.

At its brightest, Mars outshines every other planet apart from Venus.

Valleys and Canyons on Mars suggest that the planet once had large amounts of surface water.

Like Earth, the poles of Mars are covered in ice. The ice becomes thicker in the winter.

Mars has the tallest Volcano in the Solar System named Olympus Mons and it is 15 miles high which is three times the height of Mount Everest.

One of Mars' moons, Phobos, is moving closer and closer to Mars. Scientists think that one day it will crash into Mars.

Mars is red because it is rusty. There is a lot of iron in the soil, and the air on Mars has made it turn red-just like rusty iron on Earth.

If the world were to become totally flat and the oceans distributed themselves evenly over the earth's surface, the water would be approximately 2 miles deep at every point.

The temperature of the Earth's interior increases by 1 degree every 60 feet down.

The Earth weighs 6,588,000,000,000,000,000,000,000 tons.

If the Earth were compressed to a sphere with a 2-inch diameter, its surface would be as smooth as a billiard ball's.

The oldest rocks in the world, the so-called St. Peter and St. Paul stones in the Atlantic Ocean, are 4 billion years old.

The Earth is estimated to be 4.5 billion years old. It travels through space at 660,000 miles per hour.

Venus is the brightest planet viewed from Earth.

Venus has mountains that are higher than Earth. Maat Mons is more than 5 miles high.

It is believed that Venus used to have bodies of water similar to Earth, but dried up over a period of 300 million years when the sun began admitting more solar energy after the sun's infancy stage.

Venus is the most widely explored planet aside from our own Earth. Numerous space probes have been sent to Venus to gather data and some have landed on the surface.

Venus rotates so slowly that it orbits the sun faster than it can make one whole rotation on its axis. In other words, Venus has a longer day than year.

Venus is the second planet from the sun and the closest planet to Earth. It is about 7,520 miles which is about 400 miles smaller than that of Earth.

The surface of Mercury is heavily cratered, looking much like our moon.

Mercury is the most iron rich planet in the Solar System with an iron core like Earth.

Because of a lack of an atmosphere, the temperature on Mercury rises above 800°F while on the dark side it falls rapidly to -300°F.