To celebrate this #MayTheFourth, we're displaying the incredible photography that comes out of laser and space research. Laser Duel Fun with an Argon-ion and a He-Ne laser. —Jeff Keyzer from San Francisco, Calif., U.S.A. Spherical Aberrations A hemispherical lens highlights spherical aberrations. A red laser and a green laser, together with a pair of diffraction gratings, form an array of horizontal and vertical rays. The ray caustic can clearly be seen to the right of the lens. —Chris Summitt College of Optical Sciences, University of Arizona, USA Fiery Hourglass The protostar within the dark cloud L1527, shown in this image from NASA’s James Webb Space Telescope Near-Infrared Camera (NIRCam), is embedded within a cloud of material feeding its growth. Ejections from the star have cleared out cavities above and below it, whose boundaries glow orange and blue in this infrared view. —NASA, ESA, CSA, and STScI. Image processing: J. DePasquale, A. Pagan, and A. Koekemoer (STScI) Magne...