Big Bang Theory

How long ago did simple life start evolving on Earth?

3.8 BYA

How long ago was our Sun born and when heavy elements started to clump into planets?

5 BYA

What is the 'Big Bang Theory'?

A rapid explosion of matter from a state of extremely high density and temperature.

13.7 billion years ago a hot, dense, and small point exploded, expanded and formed the universe

Big Bang

Who discovered Red Shift?

Edwin Hubble

True or False: The 'Big Bang' ended immediately after it began?

False, the Big Bang refers to the expansion of the Universe, and yes the Universe is still expanding.

What were the two elements that were first formed in the 'Big Bang'?

Hydrogen and Helium

What is another word for the expansion of the Universe?

Inflation

What caused the Big Bang?

It is still uncertain what triggered the sudden expansion of the universe.

Why is the 'Big Bang' significant?

Scientists believe that it is the origin of the Universe.

Why is it called the 'Big Bang'?

Space expanded very quickly causing a large explosion. Thus the name 'Big Bang'.

When did the 'Big Bang' occur?

approximately 13.8 billion years ago.

Radiation found in all areas of space that is the afterglow of the big bang.

cosmic background radiation

How do we know what we know about the stars?

from analyzing starlight (radiation) that they give off

A collection of star systems A huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity

galaxy

Why do we see the colors we see?

the light that reaches our eyes due to reflection off the surface of the object

all of space and everything in it including stars, planets, galaxies, etc. - the cosmos

universe

What evidence have scientists used to prove the 'big Bang Theory'?

-Cosmic background radiation -Amount of hydrogen and helium on Earth and Space -Red shift-galaxies moving away from us.