Columbia Encyclopedia

(Encyclopedia) Space Force, United States (USSF), military force that forms a separate service within the U.S. Dept. of the Air Force, est. Dec. 20, 2019, by act of Congress. The head of the Space Force is the Chief...

(Encyclopedia)  CE5 national parks and monuments. The National Park Service, a bureau of the U.S. Dept. of the Interior, was established in 1916 to oversee the administration of 40 national parks and monuments und...

(Encyclopedia) Voyager, in space exploration: see space exploration; space probe. ...

(Encyclopedia) ultraviolet astronomy, study of celestial objects by means of the ultraviolet radiation they emit, in the wavelength range from about 90 to about 350 nanometers. Ultraviolet (UV) line spectrum measure...

(Encyclopedia) Kuiper, Gerard Peter or Gerrit Pieter gĕrˈĭt pēˈtər kīˈpər [key], 1905–73, American astronomer, b. the Netherlands. Kuiper is considered to be the father of modern planetary science for his...

(Encyclopedia) United Nations Relief and Rehabilitation Administration (UNRRA), organization founded (1943) during World War II to give aid to areas liberated from the Axis powers. There were finally 52 participatin...

(Encyclopedia) air, law of the, in the broadest sense, all law connected with the use of the air, including radio and satellite transmissions; more commonly, it refers to laws concerning civil aviation. The developm...

(Encyclopedia) space biology: see exobiology.

(Encyclopedia) oceanography, study of the seas and oceans. The major divisions of oceanography include the geological study of the ocean floor (see plate tectonics) and features; physical oceanography, which is conc...

(Encyclopedia) Mercury space program: see space exploration. ...