NASA previously announced that it would create a panel to study "unidentified aerial phenomena" (UAP), aka UFOs -- while saying it doesn't believe they're "extraterrestrial in origin." Now, the space agency has unveiled the 16-member panel that will focus on these unclassified sightings, chaired by David Spergel, former head of astrophysics at Princeton University. Other members include Anamaria Berea, a research affiliate at the SETI (Search for Extraterrestrial Life) Institute in California; retired NASA astronaut and test pilot Scott Kelly; and astrophysicists, science journalists and more. The US government is effectively running two tracks of UFO probes. There's also a Pentagon group looking into UAPs reported by military pilots and investigated by US defense and intelligence officials.