Evidence for the formation on the Universe

How do we know the Universe is expanding?

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Electromagnetic SpectrumPg. 14 in your Best Friend

Stars emit light

Stars produce a spectra – • __ • __

Discoveries from the Doppler Effect

1. __2. The further away an object is from

us, the faster it is moving away.

Therefore, the universe is expanding explosively!!!

Cosmic Background Radiation

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Universe Summary

•__•__•Evidence for Expansion:

1. __• __

2. __• __• __

Galaxies

We are located on the outer edge of the galaxy!

The Milky Way Galaxy vs. the Andromeda Galaxy

• They are on a collision course!!!

• What will happen when these two galaxies collide?

– Nothing, they are mostly empty space!

Andromeda

Sombrero Galaxy What do you think is in the center of a Galaxy

Whirlpool Galaxy

Galaxy Summary•__•__• ___• ___• ___