A Harvard University astronomer will lead a team studying national security risks posed by UFOs. The team is part of a White House council focused on this issue. The astronomer, Avi Loeb, is a cosmologist who has studied black holes and previously headed Harvard's astronomy department.

He is known for theories about alien visits that have generated controversy. Further details about the council and Loeb's role are available from the source, including more information about his background and the team's objectives.