January 25, 2020 - The official U.S. Space Force seal was unveiled January 24, 2020 by the President.
The creation of the U.S. Space Force seal pays tribute to the newest Armed Service that organizes, trains, and equips space forces in order to protect U.S. and allied interests in space and to provide space capabilities to the joint force. The U.S. Space Force seal honors the Department of the Air Force’s proud history and long-standing record of providing the best space capabilities in the world.
The delta symbol, the central design element in the seal, was first used as early as 1942 by the U.S. Army Air Forces; and was used in early Air Force space organization emblems dating back to 1961.
Since then, the delta symbol has been a prominent feature in military space community emblems.
Source: USSF