Begin watching for meteors soon after evening twilight ends on the evening of August 11th. By then the shower’s radiant — its perspective point of origin in the constellation Perseus — has risen above the northeastern horizon. The few Perseids that appear this early will be spectacularly long “earthgrazers” that skim along the top of the atmosphere. The higher the radiant, the more meteors you’ll see — so when Perseus climbs higher in the northeast, especially after midnight, more meteors should appear all over the sky.