Log in

June Second Saturday: Astronomy with David Whelan

  • June 11, 2022
  • 10:00 AM - 11:30 AM (CST)
  • Hagerman NWR Visitor Center
  • 97


Registration is closed

Details:  There are certain things that we can directly measure for stars, such as their distances and brightnesses. Much of what else we think we know, for instance about their sizes, masses, surface temperatures, chemical makeup, and internal properties, comes to us by inference. Eclipsing binary star systems can offer us (almost) direct physical insight into the sizes and masses of stars, which can in turn help us understand the observable properties of similar stars more generally; even non-eclipsing binary stars are useful for deducing physical properties. Dr. Whelan will illustrate these points both from an historical perspective and by using recent discoveries made at Adams Observatory.

Bio: Dr. David Whelan is a stellar astronomer at Austin College. His research focuses on trying to understand the nature of intermediate- and high-mass stars -- stars for which little remains known their physical nature and evolution. Unraveling these mysteries requires use of the Adams Observatory, where he concentrates on observing stellar spectra for classification and quantitative analysis. He earned his M.S. and PhD degrees at the University of Virginia, and previously worked as a researcher and software programmer for the Spitzer Space Telescope mission, with the Infrared Spectrograph team at Cornell University.

Search for any word--do not use quotes for phrases

Events and activities hosted by the Friends of Hagerman are funded by donations and powered solely by volunteers.  There are no fees for admission to the refuge or parking; the refuge is open from sunrise to sunset every day of the year, drive on any road unless gated.

6465 Refuge Road

Sherman, TX 75092


Kroger: Stop by the customer service desk at Kroger and link your Kroger Card to the Friends of Hagerman: the Friends will get rewards for every dollar you spend, at no cost to you.

Please add friendsofhagerman@gmail.com to your contacts to ensure delivery of registration confirmations, account information and the Featherless Flyer

Special thanks to Nancy Miller for the amazing photo of the Visitor Center 

See you at the refuge!

Powered by Wild Apricot Membership Software