Emma Vyssotsky (October 23, 1894 – May 12, 1975, née Emma T. R. Williams) was an American astronomer who was honored with the Annie J. Cannon Award in Astronomy in 1946. and worked at Smith College as an astronomy There, she worked with Cecilia Payne on the "spectral line contours of hydrogen and ionized calcium throughout the spectral sequence."
Select publications
Emma published much of her research under the name E. T. Williams. The couple would alternate the lead author role on their joint papers, with her name appearing first sometimes, and his name appearing first at other times.