731
Sharks Rule, Rule
(slrpnk.net)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
Unlikely Polaris. The luminosity difference between Polaris Aa and the other two is 3 orders of magnitude. Mizar and Alcor (the doublet second from the end of the Big Dipper) has been used for centuries as a vision test. If you can see the doublet, it’s equivalent to 20/20 (or 6/6) on an eye chart.
Amazing!