> Ronn suggested the following limiting magnitudes: > 4.5 for a human in a light-polluted area; > 6.5 for a human with a dark sky; > 8.3 for a cat with a dark sky, since a cat's eyes are > 6 times as sensitive as a human; > 11.5 for an owl with a dark sky, since an owl's eyes are > 100 times as sensitive as a human.
Does anyone know the _historical_ magnitudes of humanity? Like, with Galileo, we reached _x_, with Hubble, we reached _y_. Alberto Monteiro _______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
