Patrick Thaddeus was born on June 6, 1932, and died on April 28, 2017.
He was the Robert Wheeler Willson Professor of Applied Astronomy Emeritus at Harvard University.
Thaddeus was best known for mapping the Milky Way galaxy in Carbon Monoxide and was responsible for the construction of the CfA 1.2 m Millimeter-Wave Telescope.
He was married the former Janice Farrar (daughter of John Chipman Farrar and Margaret Petherbridge Farrar) in 1963.
He authored or co-authored more than three hundred research papers and more than twenty invited papers in astronomy and physics.
Patrick Thaddeus passed away at 84 years old.