CAPE CANAVERAL, Florida, Aug 30 : NASA began a new mission to probe some of the biggest mysteries in astrophysics and cosmology with the launch on Sunday of the U.S. space agency's new flagship astronomical observatory, a repurposed spy satellite that will capture panoramic views of the cosmos.The Nancy Grace Roman Space Telescope, a roughly $4 billion project, was carried aloft from NASA's Kennedy Space Center in Cape Canaveral, Florida, aboard a SpaceX Falcon Heavy rocket through blue skies just after sunrise. Its mission is planned for five years, though NASA said the telescope may have enough fuel for five additional years. The telescope, which will park itself in orbit beyond the moon, is designed to investigate cosmic enigmas such as dark energy and dark matter, while also testing gravity at vast scales and searching for exoplanets, as planets beyond our solar system are called.Sunday's launch marked "an endpoint for the engineers, but it's a starting point for the scientists," Julie McEnery, Roman telescope senior project scientist, told reporters at a post-launch news conference. "It feels like I'm on the edge of a precipice, and we're just about to set a foot off into the unknown."