Ask Ethan: How many stars in the night sky still exist?
Ethan Siegel

Ethan, I have read an essay concerning signals from star HD 164595 and it says: “Because the receivers used were making broad band measurements, there’s really nothing about this “signal” that would distinguish it from a natural radio transient (stellar flare, active galactic nucleus, microlensing of a background source, etc.)”, wrote Eric Korpela. Could you kindly share your knowledge on that, please?

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