Welcome to Mount Wilson Observatory, operated by the Mount Wilson Institute. Much of the initial understanding of our Universe came from data acquired at this facility. Located just outside of Pasadena California in the San Gabriel Mountains, the observatory has a heritage dating from the beginning of this century, and continues to remain at the forefront of observational astronomy and astrophysics. The local meterological conditions above the Los Angeles Basin provide excellent atmospheric seeing for most of the year.
The Mount Wilson Observatory Association (MWOA), is a non-profit support group for the observatory.