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Week 1 Sci 151

In: Science

Submitted By MJ22205
Words 1262
Pages 6
Complete the outline following the instructions above. Use the example as a guide, using complete sentences for all subpoints.

1. Our place in the universe
a. The modern view of the universe
1) What is our Sun and what is its role in the solar system?
a. The Sun is a fairly ordinary but large star.
b. The Sun is the focal point of our solar system, because all of the planets orbit the Sun.
2) What is our Milky Way galaxy and the sun’s position in it?
a. The Milky Way galaxy is where our solar system is located in the universe.
b. The Milky Way galaxy is home to over 100 billion stars and the Sun is one of those stars.
3) What is the Big Bang and what does it say about the age of the universe?
a. The Big Bang is when the universe began.
b. The Big Bang is thought to have happened about 14 billion years ago.
4) What is meant by the phase “looking out in the universe is looking back in time?”
a. When viewing the universe we see a vast amount of stars.
b. The light from stars must travel great distances to reach us, and these distances take years.
c. So when we see a star we are seeing the star as it was when the light first started traveling.
b. Where are we in the universe?
1) What is Earth’s place in the solar system?
a. The Earth is our home.
b. The Earth is the only planet known to sustain human life.
2) How close are the nearest stars to the Sun as compared to the distance between the Sun and the Earth?
3) How large is our Milky Way galaxy?
a. The Milky Way galaxy is home to our solar system.
b. The Milky Way galaxy has a 100,000 light-year diameter.
4) How many stars are estimated to exist in our galaxy?
a. There are roughly 100 billion stars in the Milky Way Galaxy.
b. So many stars that it would take someone’s entire life plus many more years to count them all.
5) How old is the earth compared to the universe itself?
a. The Earth is...

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