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Title: What is a planetary nebula? Post by: killian on Apr 29, 2014 What is a planetary nebula?
A) a disk of gas surrounding a protostar that may form into planets B) what is left of its planets after a low-mass star has ended its life C) the expanding shell of gas that is no longer gravitationally bound to the remnant of a low-mass star D) the molecular cloud from which protostars form E) the expanding shell of gas that is left when a white dwarf explodes as a supernova Title: Re: What is a planetary nebula? Post by: padre on May 7, 2014 Content hidden
Title: Re: What is a planetary nebula? Post by: killian on May 7, 2014 Thx sir
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