Physics, 06.05.2020 02:27 thinkerbelly157

Which statement is FALSE?

a) planetary nebulae can have layers because of pulsating stars
b) planetary nebulae usually last tens of thousands of years
c) a planetary nebula will be part of the end state of the Sun
d) planetary nebulae usually have black holes at their centers
e) planetary nebulae are a few light years in size

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