A light-year (abbreviation: ly), sometimes written light year, is a unit of length used informally to express astronomical distances.
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A minute of arc (MOA), arcminute (arcmin) or minute arc is a unit of angular measurement equal to one-sixtieth of one degree.
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A parsec (symbol: pc) is a unit of length used to measure the astronomically large distances to objects outside the Solar System.
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A red dwarf is a small and relatively cool star on the main sequence, either late K or M spectral type.
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In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
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The Astrophysical Journal, often abbreviated ApJ (pronounced "ap jay") in references and speech, is a peer-reviewed scientific journal of astrophysics, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.
Virgo is one of the constellations of the zodiac.
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To help compare different distances this page lists lengths starting at 1015 m (1 Pm or 1,000,000 million km or 6685 astronomical units (AU) or 0.11 light years).
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