Photos: Gallery of Delta 2 launch

NASA has partially restored the Hubble Space Telescope to science mode after a software error temporarily halted observations, but engineers continue studying a problem that kept the telescope’s aperture door from closing and a separate concern with Hubble’s main camera.

A four-stage Vega rocket streaked into space Tuesday night from French Guiana, hauling two Israeli-made satellites into polar orbit on military surveillance and environmental research missions.

NASA and Northrop Grumman are expected to base the launch of an air-dropped Pegasus rocket with a NASA science satellite from Cape Canaveral later this year, after originally trying to get the mission into space from a remote island in the middle of the Pacific Ocean.