The Solar System
Some images
Dwarf planets, moons and other objects
Planets and the Sun
Formation
- A big cloud of gas began to spin and collapse
- At the center, gravity pulls a bunch of matters into it until it grew larger and larger
- Because the core is big, it began to compress it's particles together. The particles, called atoms, became so hot that they joined together in a process called fusion. This gave birth to the sun.
- Around the sun, planets began to be made. They are sphere because of the gravity. Because the sun used up almost all the matter, fusion could not occur. These soon became planets, dwarf planets and moons. The matters that did not form too big became meteoroids, asteroids and comets.
Outer planets
Asteroids
Comets
Venus
Mercury 
Earth 
Mars 
Jupiter 
Saturn 
Uranus 
Neptune 
Comet 
Asteroid belt 
Dwarf planets
Sun
The ancient Romans called Sun "Sol"
The sun is actually a star!
It's very hot
Surface: 10 000 Farenheit.
Core: 27 000 degrees.
Large gravity
Diameter: 825 000 miles.
You could fit 1.3 million Earths in the Sun.
Inner planets
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Neptune
Uranus
Asteroids are large rocky bodies that mostly orbit between Mars and Jupiter in an area called the asteroid belt. The largest asteroid in the region is called Vesta, and it is 328 miles (530 kilometers) wide.
Comet are called "Dirty snowballs" because they are made of frozen water, gas and dusk. A really famous comet, named Halley, is visible to the Earth every 75-76 years.
The biggest planet in the solar system was Jupiter. It's a gas planet.
Moons
Moons are natural satellites. They orbit planets and asteroids all over our solar system. There are about 200 moons in the solar system. Almost every major planets have moons, except for Venus and Mercury.
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Dwarf planets are big enough to be shaped like spheres but too small to push smaller space objects out of their orbits. Four other space objects are also considered dwarf planets are Ceres, Eris, Haumea, and Makemake.
Pluto was considered a planet before, but in 2006, scientists downgraded it to dwarf planet.
80% of this planet is made of a hard dense fluid of icy material-water, methane and ammonia-above a small rocky core.
It's the coldest planet in the solar system, although it's closer to the sun than Neptune
Diameter: 50,724 km
It had rings, although really faint.
Diameter: 50,724 km
Another gas planet of the solar system.
Diameter: 116,460 km
Diameter: 49,244 km
Closest planet to the sun
Smallest planet in the solar system.
Diameter: 4,879.4 km
Second brightest object from Earth view, after the moon.
Diameter: 12,104 km
Only known planet that had life in the solar system.
Diameter: 12,742 km
Known as the "Red Planet"
Diameter: 6,779 km