All Questions
2
questions
1
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Why is there a discrepancy with calculated and given age of nebula
In the book "Horizons: exploring the universe-Cengage learning (2018)", page 206, it states that:
Simple observations tell astronomers about the nature of planetary nebulae. Their angular ...
- 1,296
4
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1
answer
70
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Long-lived supernova remnants?
We cannot see the supernova remnant of the star that triggered the formation of the Sun and the Solar System, as the remnant dispersed and became mixed into the interstellar medium. So I am wondering, ...
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