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ORIGIN AND STRUCTURE OF THE UNIVERSE AND OUR SOLAR SYSTEM
Transcript of ORIGIN AND STRUCTURE OF THE UNIVERSE AND OUR SOLAR SYSTEM
How/When did it all start?
It all started with the Big Bang Theory! No, I am not talking about the TV show, I am talking about the Big Bang that happened over 15 billion years ago. There once was a spot in the universes that contained everything. It was called a Singularity. Then for some unknown reason, it went
It exploded sending space, time and matter everywhere. This is what we call the Big Bang. It was hot at first, but once it cooled down the first galexies were formed. The energy from the bang expanded and its still expanding today. That was how the universe was created.
By Sophia 601
What is out there?
There are many things out there in the universe. The most know are galaxies, planets, stars and asteroids. This is OK for your average Joe, but an astronaut, other people who study space and us needs to know more!
Difference between Planets
Lets start with knowing the difference between planets. There are 3 main types, terrestrial, gas giants and dwarf planets. Terrestrial planets are big rounded pieces of rock. Earth is one of these. Gas Giants are planets mostly made out of gas. Jupiter is one of these. Dwarf planets are cold rocky planets. Pluto is one of these.
Our Solar System
In our solar system, inside the Milky Way, you will find 8 planets. They include Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune and Uranus (and Pluto). Mercury is a terrestrial planet and the closest planet to the sun. It is the hottest planet. Venus is also a terrestrial planet and the second closest to the sun. It is the same size as earth but not capable of life. Earth, our home planet, is the third planet from the sun. It is the perfect distance from the sun for all life. Mars, also known as the red planet, is the fourth planet from the sun. Rovers on this planet found traces of ice capes which means that it could have been a planet like Earth. Between Mars and Jupiter is an asteroid belt. It is a belt made of rocks rotating around the inner four planets. There are other asteroid belts in the universe but this is the most well-known. Jupiter is the largest planet in our solar system. It is the fifth away from the sun and has a red spot that is a permanent storm. Saturn is a gas giant, well known for its rings. The rings are made of ice and rocks. Neptune is the sixth planet from the sun. It is another gas giant and is very blue. Uranus is the last gas giant in our solar system. The rings around this planet are tilted to the side. Pluto, which is no longer classified as a planet, is a dwarf planet. It has 3 moons and is very small. There is also something called dark matter in our solar system. It is a substance that scientists’ don't really know much about.
There are Over 30000 galaxies in the universe and more counting. There are 3 main types of galaxies irregular, spiral and elliptical galaxies. Irregular galaxies are unknown shapes and have young stars, gas and dust. Spiral galaxies are a spirally shape with middle age stars and gas. Elliptical galaxies are a circle or sphere shape, contain old stars and not allot of gas or dust. In the center of most galaxies, a black hole lies. Black holes happen when stars collapses.
Obviously this isn't even half of whats out in the universe but to explain all of it, well that will take over 100 years.
How Were Galaxies Created?
Four billion years after the big bang, electrons that used to move very fast around space started to cool and slow down. This meant that finally they can connect to the neutrons and protons. It created the first 2 atoms, helium and hydrogen. The universe at first was a cloud of helium and hydrogen. With small disturbances of the atoms, galaxies and stars were formed. When the stars exploded, it released all the necessary elements to create planets and life itself. Even today, not only is the universe is still creating galaxies, stars and planets, but it is also expanding farther into space.
Earth, Our Perfect Planet
Planet Earth, it is the perfect distance from the sun to have water, air and life. People have look all over the universe for a planet with life, but all have failed. This means that our planet is one of a kind and needs to be protected. Every one is pouting this wonderful planet, and if we don't try and protect it now, well, lets try not to think about that. If every one helps to protect the Earth, there will be no need to move planets. So far, there are no planets that can sustain life.