Milwaukee Astronomical Society

Milwaukee Astronomical Society The Milwaukee Astronomical Society (MAS) is an amateur astronomy club serving the greater Milwaukee a Astronomy is our hobby! And what do we do? You should!

We are dedicated to the fun of astronomy at all levels from beginner to expert, casual viewing to scientific research. We welcome everyone interested in astronomy. The Milwaukee Astronomical Society (MAS) dates back to 1932. Our membership is comprised of individuals of various backgrounds, ages, education, and occupations. What we all have in common is astronomy and our love of it, from beginners

to advanced amateurs, from casual observing to scientific research, and everything between. The society possesses one of the finest amateur observatories in the world, featuring 8 observatory buildings, almost entirely financed, built, and maintained by our members. All of these facilities are available to our members! We do every aspect of astronomy from solar, lunar, planetary, comets, meteors, variable stars, double stars, nova, supernova, deep sky objects such as nebulas and galaxies, and many more. There is a whole universe of objects. We view the universe. With our eyes, our binoculars, and our telescopes. From our nearby moon to quasars 5 billion light years away. Have you seen the moon, Jupiter, or Saturn through a telescope? We image the universe. Our members use digital cameras and CCD equipment to take incredible photos of all types of celestial objects. Look at the photos here and in our Showcase and you see results which only a few decades ago could only be achieved by professionals using the world’s largest instruments. We share the universe. Not just with our members, but also with the public, especially on our observatory open house nights. And with special events when there are eclipses, transits, and comets. We also do serious amateur astronomy. The club actively promotes scientific contributions such as variable star observing, eclipsing binaries, RR Lyraes, and occultations. We write scientific papers for publication and have given many presentations. And by doing so our members have won many prestigious astronomy awards, and the International Astronomy Union have named two asteroids after our members! And all of these things we do have one important thing in common: we do them because they are fun! They have to be because astronomy for us is a hobby. But it is a hobby we are passionate about. We hope you can see that by the information here on our website. However, there is nothing better than experiencing our club in person. The MAS generally meets on the third Friday of every month from September to May with the exception of December. Presentations by club members and by professional astronomers are the focus of these meetings. The schedule for the membership meeting can change so check this site, or a copy of the latest Focal Point newsletter for times and locations. The MAS board meets once a month to conduct society business on a schedule that is flexible. Refer to this site for specific meeting schedule. A key benefit of MAS membership is the Saturday key holder night. Every Saturday night a member possessing their own key to the observatory has the responsibility to open it up to the non-key-holding membership for their use. The MAS library can be accessed at this time as well. We encourage MAS members to expand their horizons and share what they have learned.

Enjoyed a night out at Wild Oaks Nature Preserve, part of the Driftless Area Land Conservancy near New Glarus  during an...
06/15/2026

Enjoyed a night out at Wild Oaks Nature Preserve, part of the Driftless Area Land Conservancy near New Glarus during an MAS Star Party with Bortle 4.5 skies. Thank you for the invitation to enjoy the sky under a new moon and a beautiful setting. The fireflies were nonstop. As MAS members, we organize observing parties like this throughout the state in search of dark skies, so get involved to join us and get in touch if you'd like to host!

Do you love camping and astronomy? Perfect, then get out to Waupaca for the annual Wisconsin Observers Weekend event sta...
06/11/2026

Do you love camping and astronomy? Perfect, then get out to Waupaca for the annual Wisconsin Observers Weekend event starting this Friday! Learn more at new-star.org/wow

06/03/2026

Enjoy a live stream at 7pm in our meeting hall at the MAS Observatory in New Berlin tonight, for a talk by Dr. Stefanie Milam, NASA Scientist, on her contributions to the James Webb Space Telescope project, with time for questions and discussion and a chance to learn a little about the observatory too. Talk by Dr. Stefanie Milam, NASA Scientist, on work with the James Webb Space Telescope

These images were taken through pesky and persistent high thin clouds, with our MAS Solar Observatory on May 29. Just a ...
06/02/2026

These images were taken through pesky and persistent high thin clouds, with our MAS Solar Observatory on May 29. Just a few small sunspots, but if you look closely, you can see their dark inner portion, the umbra, and the lighter outer part, the penumbra. In the red hydrogen-alpha image, you can see where the sunspots are and compare them if you quickly alternate between the white light image showing the sunspots and the red hydrogen-alpha image. Cool!

Note that our next Open House on June 20 1-4PM, will be during the day and we'll be watching the Sun also at our observatory. Check out our Events tab on this page for the open house event. The open house includes a talk as well by a NASA Solar System Ambassador on the search for planet 9!

Our observatory director, Lee Keith, took a little time to photograph the moon with our MAS "A" scope, which he has nick...
05/27/2026

Our observatory director, Lee Keith, took a little time to photograph the moon with our MAS "A" scope, which he has nicknamed the "planet killer". As Lee describes:
"I sampled some of the more photogenic and dramatic locations on the Moon for your perusal. The first image features the large crater Clavius at the bottom and the large, rayed crater Tycho at top left. The second image shows the large, prominent crater Copernicus and its prominent central peak at left. Lastly is the great walled plain named Tycho at center."

Address

18850 Observatory Road
New Berlin, WI
53146

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