About 90 Millimeter Observatory

About 90 Millimeter Observatory

90 Millimeter Observatory seeks to introduce students, parents and educators to STEM education through astronomy using the tools of amateur astronomy such as readily available telescopes at public star parties. We also seek opportunities to present astronomy focused classroom presentations followed by Solar observing and offing astronomy presentations and observing opportunities to students and parents during evening and after school programs. In addition, 90 Millimeter Observatory seeks to hold public star parties during township events held at public locations like parks, township buildings and public libraries.

We believe that 90 Millimeter Observatory has the potential to serve the public as well as educators at the middle and high school levels to introduce science through astronomy and encourage students to pursue careers in science, technology, engineering and math (STEM) and encourage parents and educators to support those efforts.

About Our Founder

Dan Acker has been an amateur astronomer and an avid deep sky observer since 1978 and is a member of the Delaware Valley Amateur Astronomers, Bucks-Mont Astronomical Association and founder of the 90 Millimeter Observatory. In 1986 he co-founded the ChesMont Astronomical Society. Dan welcomes your comments at


Contact us with your questions about astronomy, telescope or observing.