Milky Way/Related Articles
From Citizendium, the Citizens' Compendium
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- Andromeda (constellation) : Constellation in the northern sky, which is surrounded by Auriga, Perseus, Aries, Cetus, Eridanus, Orion and Gemini.
- Andromeda Galaxy : Nearest large spiral galaxy to the Milky Way, also known as Messier 31
- Arab : People who identify with or recognise heritage from areas of the Middle East and North Africa on linguistic, cultural, ethnic or religious grounds.
- Astronomy : The study of objects and processes in the observable universe, e.g. stars, planets, comets or asteroids.
- Beryllium : A chemical element, having the chemical symbol Be, and atomic number (the number of protons) 4.
- Crux : A constellation in the southern sky with 54 stars, symbolized as the Southern Cross.
- Dark matter : Theoretical matter that neither emits nor absorbs light and appears to interact with other matter only gravitationally.
- Democritus : (c. 494 - c. 404 BC) Greek natural philosopher who promulgated the atomic theory, which asserted that the universe is composed of two elements: the atoms and the void in which they exist and move.
- Earth : The third planet from the Sun in our solar system; the only place in the universe known by humanity to harbor life.
- Ecliptic : Great circle that apparent orbit of Sun makes on celestial sphere.
- Galaxy : Gravitationally bound system of stars typically contain ten million to one trillion stars.
- Geoffrey Chaucer : (1345-1400) English poet, author of The Canterbury Tales.
- Globular cluster : Spherical, globular collection of stars that orbits a galactic core as a satellite, and is generally smaller in size than a galaxy.
- Gravitation : The tendency of objects with mass to accelerate toward each other.
- Hercules (constellation) : Northern constellation located between Lyra and Corona Borealis, named after the Roman mythological hero adapted from the Greek hero Heracles.
- Hydra (constellation) : Stellar onstellation in the equatorial region of the southern sky near Cancer, Libra, and Centaurus, from Greek (water snake).
- Immanuel Kant : (1724–1804) German idealist and Enlightenment philosopher who tried to transcend empiricism and rationalism in the Critique of Pure Reason.
- Japanese language : (日本語 Nihongo), Japonic language spoken mostly in Japan; Japonic family's linguistic relationship to other tongues yet to be established, though Japanese may be related to Korean; written in a combination of Chinese-derived characters (漢字 kanji) and native hiragana (ひらがな) and katakana (カタカナ) scripts; about 125,000,000 native speakers worldwide.
- Korea : Historical country and peninsula of northeastern Asia, comprising the states of North Korea and South Korea.
- Light year : Distance that light travels in vacuum in one year; 9,460,730,472,580.800 km = 9.4607304 * 1012 km.
- Light : The part of the electromagnetic spectrum visible to a species' biological eye.
- Magnitude (astronomy) : Logarithmic measure of the brightness of an object, measured in a specific wavelength or passband, usually in optical or near-infrared wavelengths.
- Mass : The total amount of a substance, or alternatively, the total energy of a substance.
- Messier object : Systematic list of nebulae, galaxies, and star clusters, first compiled and published in 1771 by Charles Messier, it originally contained 45 objects, later superseded by the New General Catalogue (NGC).
- Red dwarf (star) : Small and relatively cool star, of low luminosity, being in the main sequence either late K or M spectral type.
- Solar system : The sun and the planets orbiting it.
- Star : A massive, luminous ball of plasma that is held together by gravity.
- Sun : The star that defines our solar system.
- Turkic languages : Language family of Asia and Europe.
- Uralic languages : Add brief definition or description