ALMA and HST Composite of A1689-zD1

This composite combines radio images of A1689-zD1, captured using the Atacama Large Millimeter/submillimeter Array (ALMA), shown in orange/red, with optical images from the Hubble Space Telescope (HST), shown in blue/white. In the context of its surroundings, it becomes clear how A1689-zD1 managed to “hide out” behind Abell 1689, and why gravitational lensing— the magnification of the young galaxy— are critical to studying its behaviors and processes. Credit: ALMA (ESO/NAOJ/NRAO)/H. Akins (Grinnell College), HST, B. Saxton (NRAO/AUI/NSF)