Apollo 16

Apollo 16 (April 16–27, 1972) was the tenth crewed mission in the United States Apollo space program, administered by NASA, and the fifth and penultimate to lan…

Apollo 17

Apollo 17 (December 7–19, 1972) was the eleventh and final crewed mission of NASA's Apollo program, the sixth and most recent time humans have set foot on the M…

Apollo 4

Apollo 4 (November 9, 1967), also known as SA-501, was the uncrewed first test flight of the Saturn V launch vehicle, the rocket that eventually took astronauts…

Apollo 5

Apollo 5 (launched January 22, 1968), also known as AS-204, was the uncrewed first flight of the Apollo Lunar Module (LM) that would later carry astronauts to t…

Apollo 6

Apollo 6 (April 4, 1968), also known as AS-502, was the third and final uncrewed flight in the United States' Apollo program and the second test of the Saturn V…

Apollo 7

Apollo 7 (October 11–22, 1968) was the first crewed flight in NASA's Apollo program, and saw the resumption of human spaceflight by the agency after the fire th…

Apollo 8

Apollo 8 (December 21–27, 1968) was the first crewed spacecraft to leave Earth's gravitational sphere of influence, and the first human spaceflight to reach the…

Apollo 9

Apollo 9 (March 3–13, 1969) was the third human spaceflight in NASA's Apollo program, which successfully tested systems and procedures critical to landing on th…

Apororhynchus

Apororhynchus is a genus of small parasitic spiny-headed (or thorny-headed) worms. It is the only genus in the family Apororhynchidae, which in turn is the only…

Appalachian Spring

Appalachian Spring is an American ballet created by the choreographer Martha Graham and the composer Aaron Copland, later arranged as an orchestral work. Commis…
Arts

Appaloosa

The Appaloosa is an American horse breed best known for its colorful spotted coat pattern. There is a wide range of body types within the breed, stemming from t…

Apus

Apus is a small constellation in the southern sky. It represents a bird-of-paradise, and its name means "without feet" in Greek because the bird-of-paradise was…

Aquaria (video game)

Aquaria is an action-adventure game designed by Alec Holowka and Derek Yu, who published the game in 2007 as an independent game company Bit Blot. The side-scro…
Technology

Aquilegia

Aquilegia, commonly known as columbines, is a genus of perennial flowering plants in the family Ranunculaceae (buttercups). The genus includes between 70 and 40…

ARA Moreno

ARA Moreno was a dreadnought battleship designed by the American Fore River Shipbuilding Company for the Argentine Navy. Named after Mariano Moreno, a key membe…

ARA Rivadavia

ARA Rivadavia (Spanish: [riβaˈðaβja]) was an Argentine battleship built during the South American dreadnought race. Named after the first Argentine president, B…

Arbiter (Halo)

In the Halo universe, an Arbiter is a ceremonial, religious, and political rank bestowed upon Covenant Elites. In the 2004 video game Halo 2, the rank is given …
Military

Arch of Remembrance

The Arch of Remembrance is a First World War memorial designed by Sir Edwin Lutyens and located in Victoria Park, Leicester, in the East Midlands of England. Le…
Military

Archaea

Archaea (/ɑːrˈkiːə/ ⓘ ar-KEE-ə) is a domain of organisms. Traditionally, Archaea included only its prokaryotic members, but has since been found to be paraphyle…
Science

Archaeoindris

Archaeoindris fontoynontii is an extinct giant lemur and the largest primate known to have evolved on Madagascar, comparable in size to a male gorilla. It belon…

Archaeopteryx

Archaeopteryx (/ˌɑːrkiːˈɒptərɪks/ ⓘ; lit. 'ancient wing'), sometimes referred to by its German name, "Urvogel " (lit. 'Primeval Bird') is a genus of bird-like d…
Nature

Archie Jackson

Archibald Jackson (5 September 1909 – 16 February 1933), occasionally known as Archibald Alexander Jackson, was an Australian international cricketer who played…