Dark star
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A dark star is a theoretical object compatible with Newtonian mechanics that, due to its large mass, has a surface escape velocity that equals or exceeds the speed of light. Whether light is affected by gravity under Newtonian mechanics is questionable but if it were, any light emitted at the surface of a dark star would be trapped by the star s gravity rendering it dark, hence the name. Einstein s general theory of relativity has yielded more insight into the nature of objects of extraordinary mass. Such objects by modern understanding would be described in more modern terms as black holes.

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A dark star is a theoretical object compatible with Newtonian mechanics that, due to its large mass, has a surface escape velocity that equals or exceeds the speed of light. Whether light is affected by gravity under Newtonian mechanics is questionable but if it were, any light emitted at the surface of a dark star would be trapped by the star s gravity rendering it dark, hence the name. Einstein s general theory of relativity has yielded more insight into the nature of objects of extraordinary mass. Such objects by modern understanding would be described in more modern terms as black holes.