Big, Bigger, Biggest
The four planets at the center of the solar system are solid, rocky bodies like the Earth. Jupiter, Saturn, Uranus, and Neptune are all composed primarily of gas and are known as the giant planets because they are so large compared to Earth. Pluto,a small solid icy body smaller than the Earth's Moon, is usually the outermost planet. Unmanned spacecraft have travelled to all the planets in the solar system (except Pluto) and taken pictures of the planets and many of their moons. They have also taken measurements that tell us what the planets are like inside.
A Solar System Model Builders Guide
The four rocky planets at the center of the solar system Mercury, Venus, Earth, Mars, are known as the inner planets. Jupiter, Saturn, Uranus, and Neptune are all composed primarily of gas and are known as the outer planets. Pluto,a small solid icy body smaller than the Earth's Moon, is usually the outermost planet. The asteroid belt, between Mars and Jupiter, is made of thousands of chunks of rock which travel around the Sun. Comets are small icy bodies that travel past the Sun and give off gas and dust each time they pass by.
Unmanned spacecraft have travelled to all the planets in the solar system (except Pluto) and taken pictures of the planets and many of their moons. They have also taken measurements that tell us what the planets are like inside.
A Solar System Model Builders Guide
The four inner planets at the center of the solar system Mercury, Venus, Earth, Mars, are known as the terrestrial planets because they are solid, rocky bodies. Jupiter, Saturn, Uranus, and Neptune are all composed primarily of gas and are known as the Jovian planets. Pluto, a small solid icy body smaller than the Earth's Moon, is usually the outermost planet, but occasionally passes within the orbit of Neptune. The asteroid belt, between Mars and Jupiter, is made of thousands of chunks of rock which orbit the Sun. Comets are small icy bodies that travel past the Sun and give off gas and dust each time they pass by.
Unmanned spacecraft have travelled to all the planets in the solar system (except Pluto) and taken pictures of the planets and many of their moons. They have also taken measurements that tell us about the particle, electromagnetic, and gravitational environment near the planets. This information can be used to tell us about the planets interior, surface, atmosphere, and magnetosphere.
A Solar System Model Builders Guide
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