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The adjectival forms of the names of astronomical bodies are not always easily predictable. Attested adjectival forms of the larger bodies are listed below, along with the two small Martian moons; in some cases they are accompanied by their demonymic equivalents, which denote hypothetical inhabitants of these bodies.
On some Star Trek maps of the center of the galaxy, the galactic core is regarded as its own area, not part of any of the four Quadrants. The Cytherians, from the Next Generation episode "The Nth Degree," are located near this area. In Star Trek V: The Final Frontier, a "God"-being is encountered from within what is called the "Great Barrier".
A-type star In the Harvard spectral classification system, a class of main-sequence star having spectra dominated by Balmer absorption lines of hydrogen. Stars of spectral class A are typically blue-white or white in color, measure between 1.4 and 2.1 times the mass of the Sun, and have surface temperatures of 7,600–10,000 kelvin.
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"Galactic quadrants" within Star Trek are based around a meridian that runs from the center of the Galaxy through Earth's Solar System, [7] which is not unlike the system used by astronomers. However, rather than have the perpendicular axis run through the Sun, as is done in astronomy, the Star Trek version runs the axis through the galactic ...
ELF – extremely luminous far-infrared galaxy, a synonym for Ultra-Luminous infrared galaxy; ELT – (telescope) Extremely Large Telescope; EMP – (catalog) Ephemerides of Minor Planets; EMP – (celestial object) extremely metal-poor, a star with few elements other than hydrogen and helium; EMU – Evolutionary Map of the Universe
Below are lists of the largest stars currently known, ordered by radius and separated into categories by galaxy. The unit of measurement used is the radius of the Sun (approximately 695,700 km; 432,300 mi). [1] The Sun, the orbit of Earth, Jupiter, and Neptune, compared to four stars (Pistol Star, Rho Cassiopeiae, Betelgeuse, and VY Canis Majoris)
Planetary nomenclature, like terrestrial nomenclature, is a system of uniquely identifying features on the surface of a planet or natural satellite so that the features can be easily located, described, and discussed. [1]