The Earth in Space

a)

Earth is a very small part of our universe. Earth is part of a solar system which is part of the Milky Way Galaxy. Our solar system moves around center Milky Way at 217.215 Km/s (1). Our solar system also moves up and down at 7 km/s and 20 km/s toward the center of the center of the Milky Way galaxy (1). It takes 226 million years for our solar system to do a complete cycle around the Milky Way (1). The Milky Way is a spiral galaxy. The universe is about 13.73 billion years old (2).

b)

The Big Bang is a Theory on the formation of the universe. According to the Big Bang Theory, the universe was incredibly small, smaller in a pore on skin (3), but it very density and temperature (3). It began to expand, spreading across space. Before this people thought the universe was fix size (3). The universe continues to expand to this day (3, 4).

c)

Cosmic Microwave Background helped us determine the age of the universe. Cosmic Microwave Background was discovered by Arno Penzias and Robert Wilson (5). They noticed under radio telescope that space has a faint glow from radiation (5). Back to the question cosmic microwave background helps us determine the age because the CMB radiation has emitted before the galaxy and stars were created. CMB radiation was emitted from the big bang only few hundred thousand years after it happened. Studying when the radiation was emitted from the big bang can determine the age of universe.

Bibliography

a.

1) http://biocab.org/coplanarity_solar_system_and_galaxy.html#anchor_21

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2) http://map.gsfc.nasa.gov/

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b.

3) http://www.ugcs.caltech.edu/~yukimoon/BigBang/BigBang.htm

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4) http://en.wikipedia.org/wiki/Big_Bang

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c.

5) http://en.wikipedia.org/wiki/Cosmic_microwave_background_radiation

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6) http://map.gsfc.nasa.gov/universe/bb_tests_cmb.html

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