Milwaukee Astronomical Society

Directions Website

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.

The first tests done earlier this month of the Reflect Orbital satellite that reflects sunlight back to Earth have absol...
10/22/2026

The first tests done earlier this month of the Reflect Orbital satellite that reflects sunlight back to Earth have absolutely destroyed dark skies and caused all sorts of confusion with such a bright light in the sky. Read more about what is being done, to keep our skies dark, and without grief of what is lost:

On August 6, 2026, DarkSky International filed a formal Application for Review asking the full FCC to reverse its Space Bureau’s approval of Reflect Orbital Inc.’s Earendil-1 satellite.

Thanks for the opportunity to gather and enjoy the night sky at a new location in the state, monitor dark skies and get ...
10/17/2026

Thanks for the opportunity to gather and enjoy the night sky at a new location in the state, monitor dark skies and get to know new observers. We've been grateful to enjoy two clear nights in the Driftless Area Land Conservancy. Join us in planning future explorations in Wisconsin in the future, or send us an invitation if you have a dark sky setting you would love to share with amateur astronomers.

10/15/2026

In this episode of Uniquely Wisconsin, uncover the stories behind Y...

A few images from and around the Bortle 4 skies from  Wintergreen, as taken by MAS members Craig Endres and Matt U Ryno ...
10/12/2026

A few images from and around the Bortle 4 skies from Wintergreen, as taken by MAS members Craig Endres and Matt U Ryno from our Milwaukee Astronomical Society, Madison Astronomical Society and Driftless Area Land Conservancy members star party and site exploration. Looking forward to future collaborations like this with DALC and area astronomy clubs, good to meet other observers. Looks like a potential new site for further recurring astronomy outreach too, so we look forward to what's in store in the future for the land, including some trail openings and some dark skies education.

Here's the view of Saturn Friday after our open house. One benefit of being a member of the MAS is using our telescopes ...
10/03/2026

Here's the view of Saturn Friday after our open house. One benefit of being a member of the MAS is using our telescopes every Saturday night, so if you had a great time at the open house don't wait - become a member!

MAS observatory director Lee Keith explains: Knowing that Saturn is coming to opposition to the Sun, when it is closest to earth and largest in angular size, I stuck around after the fantastic open house to get some images. According to the MAS' ClearDarkSky forecast, the seeing was to be pretty good. Also, a day either side of opposition, the rings become brighter as the shadows of the ring particles become blocked by the bright ring particles themselves.

The seeing was good at the start of my session but strangely changed in the middle of taking the monochrome images. The first 3 were pretty good then Saturn started to fade in and out so the last images I took have distorted rings. I think some high, thin clouds came in. The state of the atmosphere can change quickly & unpredictably. The last quarter Moon was rising in the eastern sky as I drove home very tired.

I took color and monochrome images on this special event. I think they came out very good. You can see the dark break Cassini division in the rings clearly as well as the many belts on the planet itself.

If you look closely at the monochrome image, just below the left-hand ring, you can faintly see the satellite Tethys!

Give it a try at one of our Saturday members nights, or use our eVscopes to take a video with science mode: ask a keyhol...
10/03/2026

Give it a try at one of our Saturday members nights, or use our eVscopes to take a video with science mode: ask a keyholder to learn how.

Have you ever spotted the asteroid Vesta?

Early October presents your chance!

To find Vesta:

• Look toward the southeast after 10 pm in early October for Beta Ceti.
• About 10º northeast of Beta is Eta, then a little further is Theta Ceti. How far is 10º? It is the width of a fist on a fully extended arm.
• Extend the distance from Eta to Theta by 1-1/2 times. Make a right angle north towards a 5th magnitude star.
• Just to that star's northwest are two stars, one of 6th mag. and the other of 7th mag. Vesta lies just to their west. Its brightness is midway between those of the 5th magnitude and the 6th magnitude stars.

• Use the maps to locate the starlike point of Vesta.
Vesta lies closest to Earth on October 8 when it is 138 million miles distant. It then shines at magnitude 6.0.

Clear skies expected tonight for our open house at the observatory, starting around 6:30pm this Friday with a talk by UW...
10/02/2026

Clear skies expected tonight for our open house at the observatory, starting around 6:30pm this Friday with a talk by UWM Planetarium Director Dr. Jean Creighton, on Visiting Mars. It promises to be an interesting night! Our event ends at 10pm tonight, donations are suggested. Check our events tab for more information or go to milwaukeeastro.org/openhouse for more information.

MAS General Meetings Our next General meeting will be on October 19th at 8PM at the Observatory. Public Open House We have open houses this year, where the public is welcome to look through our telescopes on site, including during a partial lunar eclipse! Learn more about our upcoming public nights....

More views of Saturn from A scope, which those attending our open house this Friday at our New Berlin Observatory will g...
10/01/2026

More views of Saturn from A scope, which those attending our open house this Friday at our New Berlin Observatory will get to experience! Check our events tab for more details, we start the open house Friday at 6:45pm.

Lee Keith, Observatory Director, describes the scene as he imaged Saturn earlier this week as it is near opposition. Lately we have been seeing spokes in the rings as well, theorized to be disruptions from meteorite activity around Saturn.

It was cool but mild with the waning gibbous Moon shining in my eyes. Seeing was good at the beginning of the session but quickly deteriorated. As you will note, the monochrome image is pretty sharp but the color one is quite fuzzy. I did wake up around 5AM and took a look outside and saw Jupiter getting higher in the western sky. I soon will be switching my focus from Saturn to the really big show in the sky, Jupiter! For anyone who have not seen Jupiter images or in a telescope you are in for a real treat!!

Address

18850 Observatory Road
New Berlin, WI
53146

Alerts

Be the first to know and let us send you an email when Milwaukee Astronomical Society posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Shortcuts

Share