Astronomers have released a catalog of 316 trans-Neptunian objects (TNOs) — minor planets located in the far reaches of the Solar System — detected from the first four years of the Dark Energy Survey (DES). The new catalog includes 245 discoveries by DES, 139 not previously published. An artist’s impression of a trans-Neptunian object. Image credit: NASA / ESA / G. Bacon, STScI. The goal of DES, which completed six years of data collection...