4 relations: Apparent magnitude, European Space Research Organisation, Science and Engineering Research Council, Star catalogue.
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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European Space Research Organisation
The European Space Research Organisation (ESRO) was an international organisation founded by 10 European nations with the intention of jointly pursuing scientific research in space.
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Science and Engineering Research Council
The Science and Engineering Research Council (SERC) was the UK agency in charge of publicly funded scientific and engineering research activities, including astronomy, biotechnology and biological sciences, space research and particle physics, between 1965 and 1994.
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Star catalogue
A star catalogue (Commonwealth English) or star catalog (American English), is an astronomical catalogue that lists stars.
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References
[1] https://en.wikipedia.org/wiki/TD1_Catalog_of_Stellar_Ultraviolet_Fluxes