Angular diameter

The angular diameter or apparent size is an angular measurement describing how large a sphere or circle appears from a given point of view. In the vision sciences it is called the visual angle and in optics it is the angular aperture (of a lens). The angular diameter can alternatively be thought of as the angle through which an eye or camera must rotate to look from one side of an apparent circle to the opposite side. Angular radius equals half the angular diameter.

Source: Angular diameter – Wikipedia

Glory (1989)

Directed by Edward Zwick. With Matthew Broderick, Denzel Washington, Cary Elwes, Morgan Freeman. Robert Gould Shaw leads the U.S. Civil War’s first all-black volunteer company, fighting prejudices from both his own Union Army, and the Confederates.

Source: Glory (1989) – IMDb

Kon-Tiki (2012)

Directed by Joachim Rønning, Espen Sandberg. With Pål Sverre Hagen, Anders Baasmo Christiansen, Gustaf Skarsgård, Odd-Magnus Williamson. Legendary explorer Thor Heyerdal’s epic 4,300-mile crossing of the Pacific on a balsawood raft in 1947, in an effort to prove that it was possible for South Americans to settle in Polynesia in pre-Columbian times.

Source: Kon-Tiki (2012) – IMDb