Galaxies, vast collections of billions of stars, gas, and dust held together by gravity, are scattered across the immensity of space. But every so often, a coincidence occurs: Two galaxies line up from our point of view on Earth (or from a space telescope) and appear to overlap in the sky. These rare overlapping galaxies…

Editor’s note: This release was updated on Sept. 30, 2026, to correct the name of the DISCO payload. NASA selected three new scientific investigations and their payload suites to advance our knowledge of the Moon and help pave the way for building humanity’s first lunar outpost, Moon Base. The suite of science instruments and technologies…