View the breathtaking images taken with the Large Monolithic Imager on the 4.3-meter Lowell Discovery Telescope (LDT). Located in Happy Jack, Arizona, the LDT is Lowell Observatory’s main research telescope. 

This photo gallery showcases some of the incredible images that have been taken with the LDT’s Large Monolithic Imager (LMI), an all-purpose camera capable of imaging a significant field of view in a single exposure. 

Browse a collection of digital files from our historical archives and view a list of titles available to check out from our library.

Our digital library catalog and archives includes a 3D artifact collection, virtual exhibits, search tips, and much more! All resources are free to access and download.

Check out our Youtube channel for live streams, science challenges, educational videos, and much more!

This Youtube playlist features boredom-busting science challenges for kids to do at home.

Detailed lesson plans that accompany our Science Challenge videos. We want to see your projects when you are finished, so please send them to us! Completed challenges can be submitted at any time, so disregard due dates in any of the videos.

This Youtube playlist features historical footage, behind-the-scenes tours of our archives, and much more!