A young observer peers through the CAA's vintage Celestron 16 telescope.
PUBLIC EVENTS
The CAA hosts at least 12 Saturday Public Observing events featuring a guest speaker that is followed—weather permitting—by celestial viewings through telescopes at the facility. During viewing hours, society members will be available to answer questions and provide everyone with an opportunity to look through the Society's telescopes and those of our members.
This site will be updated through out the year as we assemble our speakers and events.
Future Presentations
December 10th 7:30 PM - Virtual Event Only
Presenter: Professor Steven Spangler - Professor Emeritus - University of Iowa
Title: Understanding the "Main Sequence" of Stars
If you look at the night sky, you notice that stars vary greatly in their brightness. There are also subtle differences in color, with some being visibly red, and others white to bluish. It makes sense that some stars are brighter because they emit more light (like a 100 Watt light bulb emits more light than a 10 Watt bulb), and others because they are closer to us. If you know the distance to a star, you can determine how naturally bright it is. About 100 years ago, astronomers made a graph of the natural brightness of stars against the color, and made a major discovery. I will describe what this discovery was, and how it leads to the scientific term "main sequence" for stars.
Join Zoom Meeting
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Meeting ID: 840 2334 1436
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2023 Presentations
January 14th 7:30 PM - Virtual Event Only
Title: TBD
Presenter: TBD
February 11th 7:30 PM - Virtual Event Only
Title: TBD
Presenter: TBD
March 11th 7:30 PM – This event will be held in person as well as on Zoom
Title: TBD
Presenter: TBD
April 8th 8:00 PM – This event will be held in person as well as on Zoom
Title: TBD
Presenter: TBD
April 22nd 6:00 PM – Sundog Saturday - This event will be held in person as well as on Zoom
Title: TBD
Presenter: TBD
May 13th 8:30 PM – This event will be held in person as well as on Zoom
Title: TBD
Presenter: TBD
June 10th 8:30 PM – This event will be held in person as well as on Zoom
Title: TBD
Presenter: TBD
July 8th 8:30 PM – This event will be held in person as well as on Zoom
Title: TBD
Presenter: TBD
July 22nd 3-6 PM – Solar Saturday - This event will be held in person as well as on Zoom
Title: TBD
Presenter: TBD
August 12th 8:00 PM – This event will be held in person as well as on Zoom
Title: TBD
Presenter: TBD
September 9th 7:30 PM – This event will be held in person as well as on Zoom
Title: TBD
Presenter: TBD
October 7th 7:30 PM – This event will be held in person as well as on Zoom
Title: TBD
Presenter: TBD
October 21st 7:30 PM – International Observe the Moon Night - This event will be held in person as well as on Zoom
Title: TBD
Presenter: TBD
November 4th 7:30 PM – This event will be held in person as well as on Zoom
Title: TBD
Presenter: TBD
December 2nd 7:30 PM – Virtual Event Only
Title: TBD
Presenter: TBD
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Public observing events are held in the Eastern Iowa Observatory and Learning Center at the Palisades-Dows Observatory and Preserve through a generous agreement with the Linn County Conservation Department. For directions, please visit our Map to Pal-Dows page or download a pdf version (276 kB.)
The Cedar Amateur Astronomers, Inc. is a participating member of Night Sky Network.
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