Astronomy Essay

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Astronomy is not just about the stars. Astronomy is about the constellations, the nine planets, the sun and the moons. The solar system is very complex and has many extraordinary objects. There are four different types of stars: Protostars, Bright Stars, Red Giants, and White Dwarfs. Protostars are stars that are on the verge of being born. They are glowing clouds of dust and gas. Gravity pulls on every atom moving them towards the center of the cloud of dust, which causes the Protostar to collapse. Over a period of twenty million years the star begins to form and 10 million years after the pocket of gas was formed, a star is born.
The second types of stars are called Bright Stars. They are formed when the new star
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Because it is so hot it gives off a glowing white light. This star is called a "White Dwarf" because of its color. Out of the twenty stars that are closest to the Earth, two are White Dwarfs. The next big thing about the solar system is the Planets. The nine planets play a big part in our solar system. Astronomers have been studying them for a long time but there are still many things to learn about them. The nine planets are Earth, Jupiter, Uranus, Pluto, Saturn, Neptune, Mars, Venus, and Mercury.
Mercury is also known as the planet of Hot days and Cold nights and it is the closest planet to the sun. It has the shortest year out of all the other planets, which is 88 days long and is half the size of Earth. Mercury orbits the sun at an average distance of 36 million miles. Daytime temperatures of Mercury can reach up to 800 degrees Fahrenheit. At night they can get down as low as -279 degrees Fahrenheit.
Venus, also known as Cauldron, has a yearlong period of 243 Earth days. It is the second planet away from the sun and can reach oven-like temperatures up to 475 degrees Fahrenheit, even at night. Venus is a very bright planet, totally surrounded by clouds. "It is the sunlight reflected off these clouds that makes the planet so bright" (Ridpath 24). This planet is very unique compared to the other planets because scientists discovered that Venus actually rotates backwards also.
Mars, also known as the red planet, has air so thin that a

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