Our Staff

Dyer Observatory in spring

Billy Teets, PhD

Billy is the director of Dyer Observatory and is the resident astronomer. A great deal of his time is spent engaging the community in astronomy through Dyer’s monthly public events such as Telescope Nights, Open Houses, lectures, and concerts; leading our summer science camps and field trip groups; going out into the community and delivering science content to outside groups, businesses and area schools; and developing materials for distribution in-house and online. Around the observatory, Billy develops and maintains many of the one-of-a-kind exhibits and oversees maintenance and preservation of the observatory’s astronomical equipment. He also actively collaborates with Vanderbilt’s physics and astronomy department and teaches intro astronomy classes.


Billy grew up in Clarksville, Tennessee, and graduated with a B.S. in Physics from Austin Peay State University (2004) and a Ph.D. in (astro)physics from Vanderbilt University (2012).

I Am Vanderbilt: Billy Teets

Meet Billy Teets, Dyer Observatory Director
Facility Manager

Nathan P. Griffin

Nathan first came to Dyer in 2009 as a remodeling subcontractor and fell in love with the place at first sight. He soon found a role at the observatory that utilized his multitudinous building and problem-solving skills as well as guest relations experience honed during his decade at Breckenridge Ski Resort in Colorado. Nathan is charged with maintaining Dyer’s magnificent grounds and buildings in addition to facilitating our public and private events.


With a lifelong passion for music, Nathan spends his free time composing, playing, and singing for enthusiastic crowds around the region. The success of Dyer’s Bluebird on the Mountain concert series is due in large part to his musical and technical expertise.

Special Event Coordinator

Helen Geddes Morisette

With multiple awards and more than 20 years of experience in Nashville’s event industry, Helen offers unparalleled levels of expertise, service, and creativity to make planning your event a breeze. She will guide you through the planning process with care and support, bringing to life your event as imagined, down to the very last detail. Her goal is to put your mind at ease so you may create and enjoy your truly memorable event.


Helen is originally from Lubbock, Texas, where she spent many years in the pagent and entertainment sphere. She is a passionate animal lover and enjoys traveling domestically and internationally.

Outreach and Communications Coordinator

Alexandra Rockafellar, MLAS

Alex enjoys a wide range of roles related to astronomy education, hospitality, and keeping the “nuts and bolts” tight in the front office. Specific duties include being Dyer’s principal photographer, creating and posting social media, keeping the website updated, setting up and handling event ticketing, working with the Outreach Astronomer to develop educational materials, working public events, giving tours, greeting callers on the phone and at the door, and paying the bills.