On Tuesday evening, April 8, you can experience one of the most beautiful events the sky can deliver. Head outside no later than an hour or so after sunset (around 8:30 P.M. local daylight time) and look to the west. Your eyes should land immediately on the slender crescent Moon, oriented with its cusps standing nearly straight up from the horizon. Point your binoculars at the Moon to reveal a stunning sight: the bright Pleiades star cluster (M45...

There’s no better place to find astronomy related software than the web archive created by Astro Events Group of Ostend, Belgium. “Our compilation will actually never be complete,” says Patrick Jaecques, a member of the group. “We have updates about every week. It’s also the only part of our Dutch web site that is translated into French, German and English.” There you’ll find hundreds of programs for a wide variety of computing environments, including...