This NASA file image shows a true color photo of Saturn assembled from images collected by Voyager 2. HO/AFP/Getty Images hide caption

itoggle caption HO/AFP/Getty Images

An image taken with the NASA/ESA Hubble Space Telescope of the galaxy cluster SDSS J1038+4849 shows that it seems to be smiling. The space agency says it's the result of a symmetrical alignment of the galaxy cluster and the telescope — along with a powerful gravity field that can bend light. NASA & ESA hide caption

itoggle caption NASA & ESA

A Falcon 9 SpaceX rocket stands ready for a sunset launch from complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Fla., on Sunday. It will be carrying aloft the DSCOVR satellite. John Raoux/AP hide caption

itoggle caption John Raoux/AP

A visualization of the polarization of the Cosmic Microwave Background, or CMB, as detected by ESA's Planck satellite over the entire sky. ESA and the Planck Collaboration hide caption

itoggle caption ESA and the Planck Collaboration

Stars over the Cerro Tololo Inter-American Observatory in Chile. Sheppard and Trujillo used the new Dark Energy Camera (DECam) on a telescope there to find the distant dwarf planet 2012 VP 113. Reidar Hahn/Fermilab hide caption

itoggle caption Reidar Hahn/Fermilab

Genetically modified rice plants are shown in a lab in 2006. A new report from Pew Research shows a wide gap between perceptions of safety of GM foods between scientists and the general public. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

Close-ups of a curious surface texture on Comet 67P nicknamed "goosebumps," all of them at a scale of around 3 meters and spanning areas more than 100 meters. ESA/Rosetta/MPS hide caption

itoggle caption ESA/Rosetta/MPS

Australia's giant Parkes radio telescope detected a "fast radio burst," or FRB, last May. Researchers call FRBs, whose origins haven't been explained, "tantalizing mysteries of the radio sky." CSIRO/EPA/Landov hide caption

itoggle caption CSIRO/EPA/Landov