| Homework
#7 |
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| • | Q3.
The Ring Nebula has an angular |
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| diameter
of 72 arcsec, and we estimate it is |
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| 5000
light years away. What is its linear |
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| diameter? |
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| – | Linear
diameter = 5000 ly x 72/206265 |
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| – | Linear
diameter = 1.7 light years |
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| • | An
aside. Exansion rate is 15 km/s, so
the age is |
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| approximately
34,000 years old. |
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