A perigee full moon, or supermoon, is seen behind the Washington Monument during a total lunar eclipse on Sunday, September 27, 2015, in Washington, DC. The combination of a supermoon and total lunar eclipse last occurred in 1982 and will not happen again until 2033.
Photo Credit: NASA/Aubrey Gemignani
Last Updated: Sept. 28, 2015
Editor: Sarah Loff