ALT A spiral galaxy viewed from its side, featuring a giant halo of hot gas blowing out of its stellar disk. X-rays from Chandra and ESA’s XMM-Newton (purple and royal blue) trace hot gas driven out by supernovas and black holes and neutron stars pulling gas from their companions, while optical light (light blue, gold and white) from ground-based observer R. Jay GaBany showcases dense dust lanes. Edge-on views of galaxies allow astronomers to study how flat their stellar disks are and provide the clearest views of material located above or below the disk. Image Credit: X-ray: NASA/CXC/SAO; Optical: ©2011-2015 by R Jay GaBany, Cosmotography.com; Image Processing: NASA/CXC/SAO/L. Frattare

ALT Highlighted in purple, located in the equatorial dune fields of Saturn’s moon Titan, Ahmakiq Undae has a diameter of approximately 500 miles (810 kilometers) and borders the roughly 50-mile (80-kilometer) diameter Selk impact crater, to the upper right. Deposits formed during the impact that created Selk Crater are primary exploration targets for NASA’s Dragonfly mission. The yellow box on the global image of Titan denotes the approximate area. NASA/Jason Barnes