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Fragments of lava or rock less than 1 ⁄ 3 centimetre (0.13 in) in diameter that have been ejected into the atmosphere by a volcanic explosion. [3] aspect. Also exposure. The direction toward which a slope faces with respect to a compass or to the Sun's position in the sky, [5] or the direction which a segment of coastline faces as it meets ...
Usually, the term sky informally refers to a perspective from the Earth's surface; however, the meaning and usage can vary. An observer on the surface of the Earth can see a small part of the sky, which resembles a dome (sometimes called the sky bowl) appearing flatter during the day than at night. [1]
Sky conditions are estimated in terms of how many eighths of the sky are covered in cloud, ranging from 0 oktas (completely clear sky) through to 8 oktas (completely overcast). In addition, in the SYNOP code there is an extra cloud cover indicator '9' indicating that the sky is totally obscured (i.e. hidden from view), usually due to dense fog ...
The equatorial describes the sky as seen from the Solar System, and modern star maps almost exclusively use equatorial coordinates. The equatorial system is the normal coordinate system for most professional and many amateur astronomers having an equatorial mount that follows the movement of the sky during the night. Celestial objects are found ...
A free mode, which restricted users to 5 minutes of game play every 15 minutes, was discontinued on 1 February 2024, [19] [20] [21] although challenges and quizzes are still free to play. Free-to-play users are still able to join and play in private parties hosted by a user with a subscription. [22]
Also called Indianite. A mineral from the lime-rich end of the plagioclase group of minerals. Anorthites are usually silicates of calcium and aluminium occurring in some basic igneous rocks, typically those produced by the contact metamorphism of impure calcareous sediments. anticline An arched fold in which the layers usually dip away from the fold axis. Contrast syncline. aphanic Having the ...
Also narrow. A land or water passage that is confined or restricted by its narrow breadth, often a strait or a water gap. nation A stable community of people formed on the basis of a common geographic territory, language, economy, ethnicity, or psychological make-up as manifested in a common culture. national mapping agency A governmental agency which manages, produces, and publishes ...
Аԥсшәа; العربية; Asturianu; Azərbaycanca; বাংলা; Башҡортса; Беларуская; Беларуская (тарашкевіца)