Chapter 1 Our Place in the Universe - Astronomy
Chapter 1 Our Place in the Universe - Astronomy
Chapter 1 Our Place in the Universe - Astronomy
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Example:<br />
The distance to<br />
<strong>the</strong> Orion<br />
Nebula is about<br />
1500 light years.<br />
We see <strong>the</strong> Orion<br />
Nebula as it<br />
looked 1500<br />
years ago.