William Tyler OlcottJanuary 11, 1873 – July 6, 1936William Tyler Olcott was an American lawyer and amateur astronomer. In 1909, after attending a lecture by Edward Pickering, he developed an interest in observing variable stars. In 1911, he and professor Pickering founded the American Association of Variable Star Observers (AAVSO). Olcott also published several books to popularize the field of amateur astronomy. The Moon crater Olcott is named in his honor.