The most accurate distance measurement yet of ultra-diffuse galaxy (UDG) NGC1052-DF2 (DF2) confirms beyond any shadow of a doubt that it is lacking in dark matter. The newly measured distance of 22.1 +/-1.2 megaparsecs was obtained by an international team of researchers led by Zili Shen and Pieter van Dokkum of Yale University and Shany Danieli, a NASA Hubble Fellow at the Institute.

The American Astronomical Society (AAS) has announced the recipients of its 2021 prizes for outstanding achievements in research and education, among them several current and former scholars in the IAS School of Natural Sciences.

Richard Black...