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  2. Terraria - Wikipedia

    en.wikipedia.org/wiki/Terraria

    Terraria: Otherworld was a separate game in the series which was announced in February 2015 and planned for release later that year. [66] Otherworld tasked the player with trying to purify the world of the Corruption, which was to be achieved mainly by finding and activating "purifying towers" that push back the spread of the Corruption.

  3. Zenith - Wikipedia

    en.wikipedia.org/wiki/Zenith

    Zenith stars (also "star on top", "overhead star", "latitude star") [8] are stars whose declination equals the latitude of the observers location, and hence at some time in the day or night pass culminate (pass) through the zenith. When at the zenith the right ascension of the star equals the local sidereal time at your location.

  4. Horizontal coordinate system - Wikipedia

    en.wikipedia.org/wiki/Horizontal_coordinate_system

    Horizontal coordinates use a celestial sphere centered on the observer. Azimuth is measured eastward from the north point (sometimes from the south point) of the horizon; altitude is the angle above the horizon.

  5. Hour angle - Wikipedia

    en.wikipedia.org/wiki/Hour_angle

    The cosine of the hour angle (cos(h)) is used to calculate the solar zenith angle. At solar noon, h = 0.000 so cos(h) = 1, and before and after solar noon the cos(± h) term = the same value for morning (negative hour angle) or afternoon (positive hour angle), so that the Sun is at the same altitude in the sky at 11:00AM and 1:00PM solar time. [5]

  6. Quasi-Zenith Satellite System - Wikipedia

    en.wikipedia.org/wiki/Quasi-Zenith_Satellite_System

    Quasi-Zenith satellite orbit QZSS animation, the "Quasi-Zenith/tundra orbit" plot is clearly visible.The Quasi-Zenith Satellite System (QZSS) (Japanese: 準天頂衛星システム, Hepburn: juntenchō eisei shisutemu), also known as Michibiki (みちびき, "guidance"), is a four-satellite regional satellite navigation system and a satellite-based augmentation system developed by the Japanese ...

  7. List of games using procedural generation - Wikipedia

    en.wikipedia.org/wiki/List_of_games_using...

    Procedural generation is a common technique in computer programming to automate the creation of certain data according to guidelines set by the programmer. Many games generate aspects of the environment or non-player characters procedurally during the development process in order to save time on asset creation.

  8. Optical depth - Wikipedia

    en.wikipedia.org/wiki/Optical_depth

    The optical depth for a slant path is τ = mτ′, where τ′ refers to a vertical path, m is called the relative airmass, and for a plane-parallel atmosphere it is determined as m = sec θ where θ is the zenith angle corresponding to the given path.

  9. Solar azimuth angle - Wikipedia

    en.wikipedia.org/wiki/Solar_azimuth_angle

    The solar azimuth angle is the azimuth (horizontal angle with respect to north) of the Sun's position. [1] [2] [3] This horizontal coordinate defines the Sun's relative direction along the local horizon, whereas the solar zenith angle (or its complementary angle solar elevation) defines the Sun's apparent altitude.