Dan, we've seen them at Roundup (north of Billings), Montana; Cabo San Lucas; Aruba; and Munich. I've also seen annular eclipses at Catalina Island, CA and Puerto Vallarta. An annular (from the Latin word "annulus," or ring) eclipse occurs when the moon is further away from the earth relative to the sun and the disc of the moon only covers about 99 percent of disc of the sun. Only a very thin ring of the sun is visible. A total eclipse covers the entire sun and the corona, the sun's atmosphere, becomes visible. Solar prominences, huge hydrogen flares off the surface of the sun, are visible. Two phenomena typically occur at the start and the finish of totality: The Diamond Ring Effect, when one side of the sun is a bright glare and and a thin ring remains, and Bailey's Beads, which is the last bit of the sun's rays shining through the valleys and canyons on the surface of the moon. Bright planets and stars become visible. It's an experience totally unlike any other.