During his career developing techniques with his team to do Very Long Baseline Interferometry using widely separated but not connected radio telescopes, Tom Clark, K3IO made major contributions to Radio Astronomy Science and Engineering.
Today, we saw another outcome. NSF, EU, and many others announced the VLBI generated image of the 4 billion solar mass Black Hole at the center of the Galaxy Messier object 87 (M87 for shorthand). You could literally see all the way down to the event horizon. The used telescopes all over the world and made the signals coherent even though they were recorded using a record and timing process developed by Tom and his team at NASA Goddard and extended into the modern era with better toys than Tom had when he was the world's most accurate geodicist.
And once again, Einstein's theory of relativity was proven right in the most violent laboratory ever "seen".
73s N4HY