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Physics, 14.09.2019 03:30 kaylaxocald

Auniform gaseous nebula has an average surface brightness of 17.77 magnitudes per second of arc: (a) if a nebula has an angular area of 144 square arcsec, what is the total apparent magnitude? (b) if a nebula were moved to twice its original distance, what would happen to its angular area, total apparent magnitude, and surface brightness?

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