Have any of the stars we can see burned themselves out completely?
Olbers's paradox - Wikipedia
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Are Any Stars Visible In The Night Sky Already Dead?
Will a supernova explosion visible from Earth happen in our lifetime?
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The Death of Stars
Articles Archive - Big Think
Are Dead Stars Visible In The Night Sky? » Science ABC
Are Any Stars Visible In The Night Sky Already Dead?
The Pleiades Star Cluster Royal Observatory Greenwich Astronomy
Have any stars visible to human eyes already died? - Big Think