Photos: Gallery of Delta 2 launch

A Russian-built Earth observation satellite designed to provide reconnaissance imagery to Egyptian military officials is ready for launch Thursday from the Baikonur Cosmodrome in Kazakhstan on top of a Soyuz rocket.

What began as a concept scribbled on a cocktail napkin in a Tucson bar 12 years ago — sending a spacecraft to an asteroid and retrieving a pristine sample to bring back to Earth for study — becomes reality Thursday with the launch of NASA’s OSIRIS-REx mission.

Chinese officials say they plan to share a portion of the nearly 4 pounds of lunar material returned by the Chang’e 5 mission with other countries, but an allocation for U.S. scientists will hinge on a change in U.S. policy restricting cooperation between NASA and China’s space program.