Online ordering of Mount Wilson Observatory Merchandise is fulfilled by Spreadshirt.com. Place your orders here!

Show your support with one of our cozy hoodies or sturdy t-shirts. Looking for more Mount Wilson merchandise? Visit us on the mountain at the Cosmic Cafe, or at one of our public events, where a larger variety of items will be available.

All purchases support the Mount Wilson Institute’s mission of managing and promoting the Observatory for scientific research, historic preservation, education, public engagement, and the arts.