The Ring Nebula Is a Planetary Nebula That Currently Has

question 57

Multiple Choice

The Ring Nebula is a planetary nebula that currently has a radius of 0.4 pc and an expansion velocity of 250 km/s.Approximately how long ago did its parent star die and eject its outer layers?

• A) 1,600 years ago
• B) 3,200 years ago
• C) 5,400 years ago
• D) 28,000 years ago

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The use of human physical and intellectual labor in the creation of products and services.

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