mfb- t1_irvnot8 wrote
Reply to comment by the_fungible_man in The vast majority of the 150-400 billion stars in the Milky Way haven't been directly detected. Alpha Centauri is the nearest known star to Sol. What is the probability that there are nearer stars that remain undiscovered? by [deleted]
Various surveys looked for all objects down to magnitude ~20, that's an equivalent of Proxima Centauri but ~4000 times dimmer, or 250 light years away. Vera Rubin will improve that by more than a factor 100 in brightness.
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