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1.the big bang is 13.7 billion years old.
2.The earth is 4.5 billion years old.
3.hubble's law is when stars having blue shift and red shift indicating if they are close or far away.
video:https://www.youtube.com/watch?v=Fb0mouIptLc
picture:

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-Hubble's Law is the reason that Planets and Galaxies are moving father away from us by the speed in which is compared by their distance.
-The big bang theory is about 13.7 years old.
-The earth has 10 billion years before it goes out itself and it approximately 4.5 billions years old which is almost 1/2 towards its end.

https://www.youtube.com/watch?v=wNDGgL73ihY

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1. The universe is approximately 13.7 billion years old.
2. The universe is constantly growing and accelerating.
3. It is estimated that there are 400 billion stars in our galaxy.
https://www.youtube.com/watch?v=wNDGgL73ihY

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1. The Earth is about 4.5 billion years old
2.  The universe has no center and is constantly getting bigger every second
3. The universe began 13 billion years ago with a giant explosion known as the Big Bang.
https:/youtu.be/USFlm2OSJvs

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1. Georges Lemaitre was the first person to come up with the idea of the Big Bang Theory.
2. The Big Bang Theory produced relative abundances of light elements.
3. The universe expands according to the Hubble's law (as indicated by the redshifts of galaxies). This was discovered by the Hubble telescope created by Edwin Powell Hubble.
https://www.youtube.com/watch?v=pivS9HzattI

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- The universe was originally very hot and is cooling off as time passes
- Galaxies are moving farther away from us at speeds proportional to their distance (this is called "Hubble's Law)
- The universe is expanding as time passes
https://www.youtube.com/watch?v=6PiyUjVxukI

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1.  the big bang was a theory of how the universe was created
2. happened 13.7 billion years ago
3. George Lemaitre came up with the idea of big bag

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The Doppler Effect: what does motion do to waves?

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Three Things I have learned (lauren mullins)

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Three Things I have learned (lauren mullins)

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1. This started the formation of atoms, which eventually led to the formation of stars and galaxies
2. As a whole, the universe is growing and the temperature is falling as time passes.
3. The universe began as a very hot, small, and dense super force.
video:
https://www.nationalgeographic.com/science/space/universe/origins-of-the-universe/
picture:

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1. I learned what the Doppler Effect is.
2. The Universe started off small but it is always expanding.
3. A martian
day is 687 Earth days.

https://www.youtube.com/watch?v=3IyW63D8HYo

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1. Other theories about the universe are such as the primordial soup.
2.The Universe is still expanding till this day.
3.the universe is 13.8 billion years old.

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3 Things I have Learned- Nicholas Petrosino

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3 Things I have Learned- Nicholas Petrosino

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1. The three main evidences of the Big Bang Theory are Red shift, Cosmic Background Radiation, and Mixture of Elements.
2. In the beginning, the Universe was very small, the density was very dense, and the temperature was very hot.
3. As the Universe expands, it is also cooling down over time.
https://www.youtube.com/watch?v=HdPzOWlLrbE&t=35s

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1. the universe is 13.8 billion years old
2. in 1927 George Lemaitre came up with the idea of the universe expanding
3. evidence that supports the big bang. background radiation- microwave radiation left over from the big bang.
galaxies appear to be moving away from us at speeds proportional to their distance.
https://www.youtube.com/watch?v=wNDGgL73ihY

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 *3 Things I Have Learned* Sophie Murphy 

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 *3 Things I Have Learned* Sophie Murphy 

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1. The Big Bang happened 13.7 billion years ago.
2. Georges Lemaître was the first to publish research deriving what is now known as Hubble's Law.
3. Hubble's observation was that the red shift of galaxies was directly proportional to the distance of the galaxy from earth.
https://www.youtube.com/watch?v=wNDGgL73ihY&t=10s