It is with heavy hearts that we announce the passing of Alan R. Whitney, a brilliant and dedicated radio astronomer, who passed away on September 28, 2025, at the age of 81.

Alan grew up on a small dairy farm in Cheyenne, WY and came east to MIT where he completed all his degrees, culminating in a Ph.D. in electrical engineering. A longtime resident of Concord, MA, Alan was known for his keen intellect and unwavering drive, leaving behind a legacy of innovation and discovery that has profoundly influenced the astronomical field of very long baseline interferometry (VLBI).

Alan's professional career was defined by his long and impactful tenure at the MIT Haystack Observatory in Westford, MA, where he served as Principal Scientist, Associate Director and Interim Director. For over four decades, he was a driving force behind the development of VLBI, a technique that uses multiple radio telescopes to create a virtual telescope the size of the Earth. His work took him all over the world, a testament to the global collaboration required by his research, and his contributions were essential to pushing the boundaries of what we could observe in the cosmos, from mapping distant quasars to precisely measuring tectonic plate movements. He was highly respected for his work to further build scientific international standards, and his VLBI work continues to be foundational to many ongoing scientific initiatives. Among his proudest professional achievements was being part of the historic team that produced the first image of a black hole.

Alan was a man of diverse passions. A love of the outdoors and classical music were strong interests that he shared with his wife, Lois Anne, whom he met while both playing violin in an ensemble for a production of West Side Story at MIT. There were numerous Gilbert & Sullivan shows with Alan as concertmaster and Lois Anne as his stand partner, as well as annual operas including Carmen and La Boheme with Symphony Pro Musica. Alan also found joy in bicycling, undertaking frequent local trips around Concord neighborhoods and bike trails, as well as multiple long-distance rides with his children. He was active in multiple environmental groups and initiatives, promoting sustainability and energy efficiency. His home workshop was a testament to his practical genius, fully equipped with tools and a place where he was known for being able to fix just about anything. He was a beloved mentor and colleague: humble, kind, and always eager to share his knowledge and help others succeed. He was also a devoted husband, father and grandfather, always supportive of his family's various activities and interests.

Alan is survived by his wife, Lois Anne (née Logemann); his children, Eric (Heather) and Sarah; his grandchildren, Daniel and Harrison; his sister Carol (Dave) Anderson, and many other relatives– all of whom will cherish his memory and carry on his legacy of determination and integrity.  He was predeceased by his brother, John Whitney.

A memorial service will be held at First Parish, 20 Lexington Road, Concord, MA on Friday, October 17th at 2 pm.  To attend the service remotely, please access the following live stream link:

https://us02web.zoom.us/j/89097797380

Webinar ID: 890 9779 7380

In lieu of flowers, contributions may be made to the Alzheimer's Association ( www.alz.org ) or Rails to Trails Conservancy ( www.railstotrails.org ).

Arrangements are entrusted to Dee Funeral Home & Cremation Service of Concord.