The United Launch Alliance Atlas 5 rocket, standing 194 feet tall and and weighing a million pounds, unleashes 1.6 million pounds of thrust from its main engine and two side-mounted solid boosters to launch the secret NROL-52 payload for the U.S. National Reconnaissance Office from Cape Canaveral.

This photo gallery shows the U.S. Navy’s Mobile User Objective System communications satellite No. 4 being encapsulated in the United Launch Alliance Atlas 5 rocket’s payload fairing for the planned Aug. 31 liftoff.

Fresh images from NASA’s Juno spacecraft show an ethereal shadow cast by Jupiter’s volcanic moon Io on the planet’s swirling cloud tops.