Snapshots from Atlas 5 launch

Two NASA astronauts will take part in the first all-female spacewalk this week, a critical outing to restore lost power in the wake of an equipment failure that cropped up after new batteries were installed in the International Space Station’s solar power system during two earlier spacewalks.

NASA’s newest observatory in space has started its search for planets around other stars, officials said Friday, as astronomers zero in on worlds that are ripe for research by follow-up missions like the James Webb Space Telescope.

The United Launch Alliance Atlas 5 rocket unleashed two million pounds of thrust at 7:19 p.m. PST (10:19 p.m. EST) on Dec. 12 to blast off from Vandenberg Air Force Base in California on the NROL-35 mission. See photos of the launch from the press viewing site.