Milwaukee Astronomical Society

Astronomy is our hobby! Dedicated to the fun of astronomy at all levels from beginner to expert, casual viewing to scientific research. We welcome everyone interested in astronomy. Find out more about us.

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MAS May General Meeting
Our next general meeting is May 20th at 8:00PM at the Observatory. Interested in membership? Join us at the meeting!

Public Open House
Our next open house of the season will be on May 6th.

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Public Viewing Nights

Open House Nights for 2016

A̶p̶r̶i̶l̶ ̶2̶9̶, 7:00PM - Orion

May 6, 7:30PM - Jupiter

June 11, 6:00PM - The Sun

August 5, 7:30PM - Sagittarius

September 2, 7:00PM - Mars & Saturn

September 23, 6:30PM - Gas Giants

October 7, 6:30PM - The Moon

Jupiter is in the south at sunset and visible until 2:00AM when it sets in the west.

Mars rises in the SE at 10:30AM

Saturn rises in the SE at 11:00AM

See more sky updates:

S&T: This Weeks Sky At A Glance
Astronomy Mag: The Sky This Week

Quonset Hut Fundraising Project
Mercury Transit on May 9th. Though astronomically significant, a transit of Mercury can be disappointing for the uninitiated. The pictures above show the comparison with a Venus transit. As you can see, Mercury is so small you can (and probably will) easily mistake it for a sunspot. The way you know: keep looking and over 15-30 minutes its motion will become apparent. Because of this fact and it occurs on a Monday, we will not be hosting a public event for this at the observatory.  


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Current Sky Chart from Heavens Above  



Globular Clusters
Open Clusters
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Sky Chart
Solar Activity
Artificial Satellites
Meteor Showers
Lunar Phases


  Variable Stars

Z UMa Project
Julian Date Conversion
Eclipsing Binary Ephemeris RR Lyrae Ephemeris