Percentage of charted stars I was reading Gene Roddenberry's guide for TNG writers and he mentions that that the time of ST:TOS, only 4% of the stars in our galaxy have been charted; this goes up to 19% by the time of TNG. This got me to wondering: what percentage of stars in the Milky Way galaxy have actually been catalogued?
The largest catalogues, such as Hubble's Guide Star Catalog or the US Navy USNO-B1.0 catalogue have entries for about 1 billion object (mostly stars) with magnitudes down to 21.

The galaxy itself has about 100 billion stars, but there is considerable uncertainty about that value. The true value could be less or a lot more. Between 50 and 500 billion is the range of uncertainty

So we have catalogued between 0.2% and 2% of the galaxy's stars with best estimate of about 1% of stars have been catalogued.