Bid Bang theory

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If scientist didn't figure out the Big Bang Theory happened then, we wouldn't know that the universe is expanding because scientist used various techniques such as measuring light to come to this conclusion.Scientists use this information about our expanding universe to predict our ultimate fate.

Subtopic

What Would Happen if Scientist didn't Figure Out The Big Bang Theory Happened?

Whouldn't know how our galaxy came to be

5) All matter cooled down to 3000° C to start making gases and clouds, 1 million years

6) Universe cools down to 10 million° C, protons and neutrons combine to form helium.Other elements start to from as well.

4) Gravity came into play. Protons and neutrons are starting to form seconds after.

7) After 300 million years matter started to form the first stars and galaxies, thus creating our solar system .

3) Quick expansion and cooling of universe

2) Point exploded filling of space with all matter, stretching space

1) Very hot, very dense point in space cooled to 10 billion ◦C and continued to grow

Would have disprove Edwin Hubble's theories

All galaxies were squished together, and the universe was significantly smaller. The universe must have started as a single point meaning all matter (stars and planets) began from the same point.

The velocity of recession was defined by how the amount of shift toward the red end of the spectrum for that galaxy ( using the Doppler effect).

He announced that there was a linear (proportional) relationship between the distance of a galaxy from earth and its velocity of recession in 1929.

velocity of recession:

Rate at which an astronomical object is moving away, from Earth.

Wouldn't know age of universe

Lemaître, found that if the universe is expanding then it should be possible to calculate when the universe began (going back in time).

Age of universe 13.7 billion years ago

Lemaître (astronomer) explained the expanding of the universe. Projecting back in time, he suggested that the universe had originated as a great point/ dot (cosmic egg) coming outward from the same point in1933.

Wouldn't know universe is expanding

If the Big Bang wasn't found by scientist then, we wouldn't have the information that we live in an expanding universe.

Astronomers in the 1920s uncovered that every galaxy is moving away from the Milky Way (our galaxy) They measured light coming from other galaxies. Proving the universe is expanding.

Expansion of the universe is actually accelerating, 1990. Scientist predict that, the universe will continue to expand forever. Protons and neutrons will slowly break down until, the entire universe is made of a dilute, ever-expanding, cool mix gas of photons, neutrinos, and other particles Ultimately the universe will ends in entropic death (heat death)

Even though this isn't for million of years scientists use this information about our expanding universe to predict how are universe will end.

''All matter in the universe is moving away from all other matter''. - Edwin Hubbble

Astronomer Vesto Melvin Slipher discovered large red shifts in galaxies he was studying.Red-shifts meant that the galaxies were/are continually moving apart at enormous velocities, 1914