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4 Cards in this Set
- Front
- Back
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What is our place in the universe? |
Earth is part of the solar system>milky way>the local group of galaxies>local supercluster. |
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How did we come to be? |
*The matter that makes up everything in the universe came from the Big Bang, which produced H and He. *all other elements were constructed from H and He in stars and then recycled into new star systems like ours. |
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How can we know what the universe was like in the past? |
When we look to great distances, we are seeing events that happened long ago because light travels at a finite speed. |
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Can we see the entire universe? |
No. The observable portion of the universe is about 14 billion light-years in radius because the universe is about 14 billion years old. |
