Kudos to K.C. Cole for the fascinating "A Whole Other Cosmos" (Column One, Aug. 12) and accompanying pictures of the Crab Nebula, showing how it looks when viewed through different devices, such as X-ray and infrared.
Cosmology is a rapidly developing science with new discoveries and developments coming regularly. It is a tribute to Albert Einstein's genius that even now many of his theories are being confirmed, nearly a century after they were first postulated.
