Comments on: Using Doppelganger Stars to Measure Stellar Distances https://briankoberlein.com/2015/09/06/using-doppelganger-stars-to-measure-stellar-distances/ Brian Koberlein Tue, 19 Feb 2019 19:13:36 +0000 hourly 1 https://wordpress.org/?v=5.0.3 By: Brian Koberlein https://briankoberlein.com/2015/09/06/using-doppelganger-stars-to-measure-stellar-distances/#comment-3054 Tue, 08 Sep 2015 14:59:48 +0000 https://briankoberlein.com/?p=5200#comment-3054 It does seem rather obvious in hindsight. I suspect the idea was thought of before, but no one actually worked out a practical way to carry it out.

]]> By: Arturo Gutierrez https://briankoberlein.com/2015/09/06/using-doppelganger-stars-to-measure-stellar-distances/#comment-3050 Mon, 07 Sep 2015 17:48:46 +0000 https://briankoberlein.com/?p=5200#comment-3050 This is really ingenious. And at the same time it makes so much sense.
But now I wonder: Could a similar methodology be used to determine the distance towards galaxies of similar compositions? 😀

]]> By: MLai https://briankoberlein.com/2015/09/06/using-doppelganger-stars-to-measure-stellar-distances/#comment-3049 Mon, 07 Sep 2015 02:47:47 +0000 https://briankoberlein.com/?p=5200#comment-3049 So… “Hey if 2 stars have the same composition, they probably have the same brightness. Why don’t we easily check against our existing shared databases to see if that’s correct?”

This… is so common-sensical I’m surprised it took astrophysicists this long to try it? It seems to me to be just an inevitable advance once your community had the equipment sensitivity and the database rigour, both of which I had thought had been present for decades…?

I’m not being sarcastic. Am I missing something?

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