The Big Bang and red-shift

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When do scientists believe the Big Bang occured?
14 billion years ago.
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What is red-shift?
Light from distant galaxies has increased in wavelength and these have shifted towards the red end of the spectrum.
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What does red-shift show about galaxies around us?
They are moving away from us in all directions.
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What are Observations of Supernovae?
Observations from 1998 to the present day which show that the speed distant galaxies are moving away from us is getting faster and faster.
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What does the Big Bang theorise happened at the beginning of the universe?
All the matter in the universe was a very small, very dense ball and so very hot. Then about 14 million years ago it exploded outwards, and this explosion is still expanding our universe today.
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What is Cosmic Microwave Background Radiation?
Tiny amounts of radiation which scientists have found between galaxies and believe is hat left over from the Big Bang?
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Other cards in this set

Card 2

Front

What is red-shift?

Back

Light from distant galaxies has increased in wavelength and these have shifted towards the red end of the spectrum.

Card 3

Front

What does red-shift show about galaxies around us?

Back

Preview of the front of card 3

Card 4

Front

What are Observations of Supernovae?

Back

Preview of the front of card 4

Card 5

Front

What does the Big Bang theorise happened at the beginning of the universe?

Back

Preview of the front of card 5
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