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15 relations: Airy disk, Apparent magnitude, Astronomical unit, Binary star, Boötes, Diffraction, Earth, Flamsteed designation, Giant star, Latinisation of names, Light-year, Lucky imaging, Nordic Optical Telescope, Speckle imaging, Stellar classification.
Airy disk
In optics, the Airy disk (or Airy disc) and Airy pattern are descriptions of the best focused spot of light that a perfect lens with a circular aperture can make, limited by the diffraction of light.
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Apparent magnitude
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
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Astronomical unit
The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.
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Binary star
A binary star is a star system consisting of two stars orbiting around their common barycenter.
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Boötes
Boötes is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere.
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Diffraction
--> Diffraction refers to various phenomena that occur when a wave encounters an obstacle or a slit.
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Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
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Flamsteed designation
A Flamsteed designation is a combination of a number and constellation name that uniquely identifies most naked eye stars in the modern constellations visible from southern England.
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Giant star
A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature.
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Latinisation of names
Latinisation or Latinization is the practice of rendering a non-Latin name (or word) in a Latin style.
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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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Lucky imaging
Lucky imaging (also called lucky exposures) is one form of speckle imaging used for astronomical photography.
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Nordic Optical Telescope
The Nordic Optical Telescope (NOT) is an astronomical telescope located at Roque de los Muchachos Observatory, La Palma in the Canary Islands.
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Speckle imaging
Image:Zeta_bootis_short_exposure.png|Typical short-exposure image of a binary star (Zeta Bootis in this case) as seen through atmospheric seeing.
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Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
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Redirects here:
30 Boötis, ADS 9343, HD 129246, HD 129247, HIP 71795, HR 5477, HR 5478, SAO 101145, Zeta Boo, Zeta Bootis, Ζ Boötis.
