The Franklin Institute

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Observatory Icon

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

  • Chief astronomer Derrick Pitts educating in the Holt & Miller Observatory on the roof of The Franklin Institute.
    Stargaze with 10-inch Zeiss Refractor Telescope

    Planets, stars, star clusters, nebulae, and a even few galaxies await!

  • A young boy looking through the sunspotter telescope in The Franklin Institute's Observatory.
    Visit the nearest star—Our Sun

    See what real sunspots and flares look like without the need for shades!

  • The Franklin Institute's telescope trained on a planet above the Philadelphia skyline.
    Travel through our Solar System

    Jupiter, Saturn, Mars, and Venus are often stops on this interplanetary tour!

Interactive Map

Floor

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Map of the fourth floor, showing the location of the Observatory.
Map of the fourth floor, showing the location of the Observatory.