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Alien: The Roleplaying Game is a science fiction horror role-playing game based on the Alien film franchise. It was published by Free League Publishing in 2019.
Sagittarius A*, abbreviated as Sgr A* (/ ˈsædʒˈeɪstɑːr / SADGE-AY-star[ 3 ]), is the supermassive black hole [ 4 ][ 5 ][ 6 ] at the Galactic Center of the Milky Way. Viewed from Earth, it is located near the border of the constellations Sagittarius and Scorpius, about 5.6° south of the ecliptic, [ 7 ] visually close to the Butterfly Cluster (M6) and Lambda Scorpii.
The Milky Way is a barred spiral galaxy with a D 25 isophotal diameter estimated at 26.8 ± 1.1 kiloparsecs (87,400 ± 3,600 light-years), [ 10 ] but only about 1,000 light-years thick at the spiral arms (more at the bulge).
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The Alien franchise depicts a series of deadly encounters, predominantly spanning the 22nd and 24th centuries, between humanity and the Xenomorph; a hostile, endoparasitoid, extraterrestrial species. [ 1 ] Humanity is depicted as a space-faring species with an interstellar dominion; space journeys typically last months, even years, and require ...
The Kardashev scale (Russian: Шкала́ Кардашёва, romanized: Shkalá Kardashova) is a method of measuring a civilization 's level of technological advancement based on the amount of energy it is capable of harnessing and using.
The supergalactic coordinate system is a reference frame for the supercluster of galaxies that contains the Milky Way galaxy, referenced to a local relatively flat collection of galaxy clusters used to define the supergalactic plane. The supergalactic plane is more or less perpendicular to the plane of the Milky Way; the angle is 84.5°. As viewed from Earth, the plane traces a great circle ...
1/2 + 1/4 + 1/8 + 1/16 + ⋯. First six summands drawn as portions of a square. The geometric series on the real line. In mathematics, the infinite series 1 2 + 1 4 + 1 8 + 1 16 + ··· is an elementary example of a geometric series that converges absolutely. The sum of the series is 1.