Visit the Holt & Miller Observatory for a bit of rooftop sky gazing! The space provides views of the Philadelphia Skyline while our historic 10-inch Zeiss Refracting Telescope provides views of the moon, most planets, star clusters, nebulae, a few galaxies, and even our closest star, the Sun.
The Holt & Miller Observatory is operated and maintained by The Franklin Institute’s Chief Astronomer, Derrick Pitts, along with the Institute's knowledgeable staff.
Things to Do and See at the Observatory
Stargaze with 10-inch Zeiss Refractor Telescope
Planets, stars, star clusters, nebulae, and a even few galaxies await!
Visit the nearest star—Our Sun
See what real sunspots and flares look like without the need for shades!
Travel through our Solar System
Jupiter, Saturn, Mars, and Venus are often stops on this interplanetary tour!