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What does the Universe consist of ?

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by

Secina Afeworki

on 15 September 2015

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Transcript of What does the Universe consist of ?

Stars
THERE ARE 300 BILLION STARS in the Milky Way !! Think about the Universe!
Stars may seem white, but if you look harder its actually white, gold, red, and blue.
Solar Systems
Planets
10% of the Milky Way are planets. So if 10% of them are planets that means there are about 30 billion planets in our galaxy alone and there are about 100 billion galaxies.
Debris
Space debris is also called orbital debris, space junk, and space waste. Space junk orbits the Earth. There are about 100.5 million debris orbiting the Earth. They travel about 17,00 miles per hour.
Secina Afeworki
Mr.Teague
Period 3
Categories
What does the Universe consist of ?
The Universe has three types of subtances which are normal matter,dark matter,and dark energy.
Normal Matter
What does Normal Matter consists of ?
Stars
Planets
Human Beings
EVERYTHING VISIBLE IN THE UNIVERSE
Everything above is made by atoms. Still only 1%-10% of the Universe is Normal Matter.

Dark Matter
It is thought that 27% of the Universe is made up of dark matter. All dark matter CANNOT BE SEEN. Nope not even by the fanciest telescope can give you the power to see dark matter. Here's the thing, dark matter has not been detected directly... making it one of the most mysterious mystery.Ok so how do we know about dark matter. Well, according to Wikipedia, "Dark matter's existence is inferred from gravitational effects on visible matter and gravitational lensing of background radiation, and was originally hypothesized to account for discrepancies between calculations of the mass of galaxies, clusters of galaxies and the entire universe made through dynamical and general relativistic means, and calculations based on the mass of the visible "luminous" matter these objects contain: stars and the gas and dust of the interstellar and intergalactic medium.
Dark Energy
Dark energy makes up 68% of the universe.The two leading models are a cosmological constant is thought to be behind the expansion of the Universe and quintessence is also another theory in why the Universe is always expanding. Dark energy is the most accepted theory of why the Universe is always expanding.
THERE MORE THAN ONE SOLAR SYSTEM IN THE UNIVERSE!!!!!
The number of solar systems are unknown.
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