1 black holes result from the stars that are initially at, Ask an Expert

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1. Black holes result from the stars that are initially at least:

half the mass of the Sun

twice the mass of the Sun

eight times the mass of the Sun

25 times the mass of the Sun

2. The Helix and Egg nebulae are

supernova remnants.

planetary nebulae.

the result of carbon detonation.

the result of the collapse of the iron core of each star.

nebulae associated with Herbig-Haro objects.

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