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9 relations: Earth, Epoch (astronomy), Light-year, Parsec, Red dwarf, Scutum (constellation), Stellar classification, The Astronomical Journal, The Astrophysical Journal.

Earth

Earth is the third planet from the Sun and the only astronomical object known to harbor life.

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Epoch (astronomy)

In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.

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Light-year

The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.

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Parsec

The parsec (symbol: pc) is a unit of length used to measure large distances to astronomical objects outside the Solar System.

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Red dwarf

A red dwarf (or M dwarf) is a small and relatively cool star on the main sequence, of M spectral type.

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Scutum (constellation)

Scutum is a small constellation introduced in the seventeenth century.

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Stellar classification

In astronomy, stellar classification is the classification of stars based on their spectral characteristics.

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The Astronomical Journal

The Astronomical Journal (often abbreviated AJ in scientific papers and references) is a peer-reviewed monthly scientific journal owned by the American Astronomical Society and currently published by IOP Publishing.

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The Astrophysical Journal

The Astrophysical Journal, often abbreviated ApJ (pronounced "ap jay") in references and speech, is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.

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References

[1] https://en.wikipedia.org/wiki/2MASS_J18450079-1409036

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