The Perseid meteor shower is one of stargazers' most trusted annual events, a light show that rarely disappoints and is very visible.
And early Wednesday morning, those ambitious enough and rested enough to head out at 2 a.m. to a dark field or backyard will be treated to fiery rocks streaming across the sky.
(Update: In the greater Philadelphia area, weather forecasts are currently deeming it nearly certain that stormy weather will block out the Perseids from our view Wednesday morning.)
NASA estimates the best viewing time for people across the United States will be 3 to 4 a.m. (whatever your time zone). But the way to truly appreciate the atmospheric marvel is to get to a dark spot — away from city lights, in particular — and give your eyes 45 minutes to get used to the darkness.