75th Anniversary

A Texas Landmark for 75 yearsCelebrating Discovery Since 1939


The University of Texas at Austin’s McDonald Observatory, dedicated May 5, 1939, turns 75 this year!


The Observatory plans a full year of activities around the state to celebrate. Events have already begun, and will run through August 2014. Plans include a speakers series featuring McDonald Observatory astronomers in multiple cities, an Open House at the Observatory, and more.

View the Timeline

Scroll through the history of McDonald Observatory from the 1920s until today. Read up on construction, personalities, and major discoveries. More »

Read the Stories

Share your memories and photos of McDonald Observatory on our interactive blog. We want to hear from visitors, astronomers, staffers — everyone! More »

Support the Celebration

Help us continue to produce great education and outreach programs by giving a one-time gift, joining the Friends of McDonald Observatory, or becoming an anniversary sponsor. More »