8 relations: Apparent magnitude, Astronomical unit, Comet, Julian year (astronomy), List of numbered comets, List of periodic comets, Mount John University Observatory, Solar System.
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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Comet
A comet is an icy small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process called outgassing.
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Julian year (astronomy)
In astronomy, a Julian year (symbol: a) is a unit of measurement of time defined as exactly 365.25 days of SI seconds each.
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List of numbered comets
This is a list of periodic comets that were numbered by the Minor Planet Center after having been observed on at least two occasions.
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List of periodic comets
Periodic comets (also known as short-period comets) are comets having orbital periods of less than 200 years or that have been observed during more than a single perihelion passage (e.g. 153P/Ikeya–Zhang).
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Mount John University Observatory
University of Canterbury Mount John Observatory (UCMJO), previously known as Mt John University Observatory (MJUO),is New Zealand's premier astronomical research observatory.
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Solar System
The Solar SystemCapitalization of the name varies.
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