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Title: A planetary nebula isA)a contracting spherical cloud of gas surrounding a newly formed star in which ... Post by: symbo on Mar 19, 2017 A planetary nebula is
A) a contracting spherical cloud of gas surrounding a newly formed star in which planets are forming. B) an expanding gas shell surrounding a hot, burned-out stellar core. C) a disk-shaped nebula of dust and gas, photographed around a relatively young star, from which planets will eventually form. D) the nebula caused by the supernova explosion of a massive star. Title: Re: A planetary nebula isA)a contracting spherical cloud of gas surrounding a newly formed star in ... Post by: discoverer on Mar 19, 2017 Content hidden
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