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Astronomy (Structure of the Solar System (Planets (The temperatures of…
Astronomy
Structure of the Solar System
Comets
Comets are made up of rocky material, dust and ice.
As a comet approaches the sun, it vaporises (turns into a gas) forming a distinctive tail in the sky.
Asteroids
Asteroids orbit the sun in highly elliptical (oval or egg shaped) orbits and may take millions of years to complete.
Made of metals and rocky materials.
There are large numbers of asteroids orbiting the sun, in an
asteroid belt
between Mars and Jupiter.
Dwarf Planets
Planets
Each planet in the solar system orbits the sun, at different distances.
The temperatures of each planet varies with their distance from the sun.
Neptune is very far away from the sun, and is -200 degrees celsius.
Mercury is close to the sun, and is 430 degrees celsius.
There are eight planets in our solar system.
The further away from the sun the planets are, the longer it takes for them to orbit it.
Mercury (the second closest planet to the sun) takes 88 days to orbit the sun.
Neptune takes 165 days to orbit the sun and is the second furthest away planet from the sun.
For a planet to form, it's gravity needs to be strong enough to shape into a spherical or round shape.
To form a planet must also be strong enough to pull smaller nearby objects into it's orbit.
Moons
Each planet has a different amount of moons- Saturn has over 50.
A moon is a satellite to the planet it orbits.