Milwaukee Astronomical Society

Milwaukee Astronomical Society The Milwaukee Astronomical Society (MAS) is an amateur astronomy club serving the greater Milwaukee area 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.

Enjoy these views of hydrogen alpha emissions on the sun this Friday from our new Spectroheliograph, the MLAstro SHG700,...
08/29/2026

Enjoy these views of hydrogen alpha emissions on the sun this Friday from our new Spectroheliograph, the MLAstro SHG700, installed in our f/5 127mm achromat refractor at our solar observatory! Thank you to MLAstro for the donation of this wonderful equipment, and to ToupTek Astronomy Cameras for the G3M678M planetary camera connected to it, which forms a great match in our observatory. We hope you'll get to learn how to use this device alongside other members this year, or enjoy the output here too. These views in mono, color and inverted mono all showcase active sunspot regions, prominences and filaments on the surface of the sun.

MAS member and presenter last night, Todd Mke Weiler shared his partial lunar eclipse time lapse taken last night with a...
08/28/2026

MAS member and presenter last night, Todd Mke Weiler shared his partial lunar eclipse time lapse taken last night with a popular Dwarflabs Dwarf 3 smart telescope, which is about the size of a football. We have smart scopes just like this available for members of the MAS to use any Saturday night! https://youtu.be/xY6COdx0Drw

Partial Blood Moon August 27-28, 2026. Shot at Milwaukee Astronomic...

Sometimes when we say it was a packed night it's hard to show you since we keep it dark for observing. Thanks to Jason, ...
08/28/2026

Sometimes when we say it was a packed night it's hard to show you since we keep it dark for observing. Thanks to Jason, William and others for pausing to turn the camera toward the crowd and capture the story of the hundreds of visitors who came to watch at our New Berlin observatory. It was a fun eclipse watch Thursday!

Thanks for stopping out to share the near total lunar eclipse with us. Our volunteers were happy to share the night sky ...
08/28/2026

Thanks for stopping out to share the near total lunar eclipse with us. Our volunteers were happy to share the night sky with hundreds of visitors tonight. We hope to see some of you again as members or at our next open house next month, there's so much to view and learn more about.

The Milwaukee Astronomical Society in New Berlin hosted an open house and watch party for the partial lunar eclipse Thursday night.

Come on out this Thursday at 7:30pm to our open house and watch the lunar eclipse with other stargazers. Here's a little...
08/26/2026

Come on out this Thursday at 7:30pm to our open house and watch the lunar eclipse with other stargazers. Here's a little glimpse into what it's like to visit the MAS and be a member, learn more when you visit this week. Our talks start at 7:30pm and take us into the beginning of the eclipse.

A lunar eclipse will give skywatchers across southeast Wisconsin a chance to see the moon take on a reddish hue Thursday night

Thank you for visiting us, TMJ4 News!We’re excited for tomorrow’s (Aug. 27) lunar eclipse and can’t wait to share this s...
08/26/2026

Thank you for visiting us, TMJ4 News!

We’re excited for tomorrow’s (Aug. 27) lunar eclipse and can’t wait to share this spectacular night with the community. 🌕🔭

Join us for our public open house with presentations beginning at 7:30 p.m., followed by observatory tours, lunar eclipse viewing and more!

Learn more at milwaukeeastro.org/aboutMAS/observingNights.asp

A lunar eclipse will give skywatchers across southeast Wisconsin a chance to see the moon take on a reddish hue Thursday night, and the Milwaukee Astronomical Society is opening its observatory to the public for the occasion.

What to know at the link in the comments.

Here is what will be happening this Thursday. Although it's not a total lunar eclipse it is close enough to enjoy color ...
08/25/2026

Here is what will be happening this Thursday. Although it's not a total lunar eclipse it is close enough to enjoy color changes and most of the fun of the eclipse. Come watch with us at the observatory this Thursday from 7:30 to midnight - view our event page for details.

If you can observe only one celestial event in the evening this August, see this one.
The Moon slides through a deep partial eclipse
In the late evening hours on August 27 and into the early morning hours on August 28, the brilliant full moon slides into Earth's shadow.
• Even though the partial umbral eclipse begins at 9:33 pm CDT on Aug 27, any dark bite might not be noticed for another 5 minutes.
• At and near mid eclipse, many stars will the visible, ones that weren’t seen before the eclipse started.
• At mid eclipse (11:42 pm CDT Aug 27) when 93% of the moon lies in the umbral shadow, what color is the moon? How red is it?
• Do you notice that the shadow's edge is not straight, but curved?

Sharing out a sky chart created by a visual observer for finding some of the brightest night sky objects, for more of th...
08/24/2026

Sharing out a sky chart created by a visual observer for finding some of the brightest night sky objects, for more of those mild and clear nights ahead hopefully.

Milwaukee Astronomical Society observatory director, Lee Keith, took a few snaps of Saturn on August 20th from the MAS A...
08/21/2026

Milwaukee Astronomical Society observatory director, Lee Keith, took a few snaps of Saturn on August 20th from the MAS A scope with a planetary camera we have available for members at our observatory, and he set up very early in the morning. It was worth it as he describes it, "the images are great and show some significant detail on the globe! Since it was a good night, I took monochrome and color images so you could see the difference between planetary camera types (one shot color and monochrome). It was a cool, wet night with no wind. A potentially perfect night for planets and it was!" ZWO Astrophotography

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18850 Observatory Road
New Berlin, WI
53146

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