18.53: wiu6thesupernovaof1885
- Page ID
- 32347
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- Use the image to measure the angular size of the remnant.
- Use the spectrum to estimate the expansion velocity of the cloud.
- Use the age of the remnant and its expansion velocity to determine the physical size of the cloud.
- Use the small angle formula to determine a distancr from the angulat size and physical size.