Recorded presentations from select past speakers can be found on the GRAAA Youtube channel.
Below you can find slides shared with us by speakers from meetings and special events.
"Unlocking the Sun, Spectroscopy in the 1800s"
Speaker: Dr. Lauren Woolsey
Date: September 17, 2020
Dr. Woolsey brings us a tale of scientific mystery that includes far-flung expeditions and unexpected discoveries. She carries us through a key turning point in science history, as scientists began to better understand the sun, and how it shines. She concludes with what they still seek to know better.
"How to Pick the Right Telescope for Christmas"
Speaker: Greg Comegys and Friends
Date: November 9, 2019
Do you, a family member, or a friend have a budding interest in amateur astronomy? Do you want to encourage that interest but do not know where to begin? This seminar will include timely advice for the holiday season that is also applicable any time of the year.
Participants will learn about different telescope options and will be made aware of various factors for a satisfactory purchase (such as cost, experience level, and features). Also helpful for those who already own telescopes and may be considering an upgrade!
"Astronomy - My New Hobby"
Speaker: Greg Comegys
Date: February 9, 2019
Presented as part of the "Astronomy as a Hobby" series, session 2 of 3, "Telescopes, Accessories, and How to Use Them." Learn how to select the right telescope for you, and equipment challenges often encountered by beginning amateur astronomers.