The foregoing examples demonstrate amply that there is no difficulty producing a variety of stars in the present-day Galaxy, given the right conditions. Of course, part of our task is to elucidate what those "right conditions" are. Another goal must be to discern the sequence of events by which a rarified cloud actually condenses to the stellar state. Clearly, both efforts should be informed by a working knowledge of stars as physical objects and of the conceptual tools that have been developed for their study.
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