[PAR] [TLE] Hipparchus [SEP] Hipparchus of Nicaea ( ; Greek: Ἵππαρχος, "Hipparkhos" ;  ) was a Greek astronomer, geographer, and mathematician.  He is considered the founder of trigonometry but is most famous for his incidental discovery of precession of the equinoxes. [PAR] [TLE] Magnitude (astronomy) [SEP] In astronomy, magnitude is a logarithmic measure of the brightness of an object, measured in a specific wavelength or passband, usually in the visible or near-infrared spectrum.  An imprecise but systematic determination of the magnitude of objects was introduced in ancient times by Hipparchus.
[PAR] [TLE] Hipparchus [ SEP ] Hipparchus of Nicaea ( ; Greek : Ἵππαρχος , " Hipparkhos " ; ) was a Greek astronomer , geographer , and mathematician . He is considered the founder of trigonometry but is most famous for his incidental discovery of precession of the equinoxes . [PAR] [TLE] Magnitude ( astronomy ) [ SEP ] In astronomy , magnitude is a logarithmic measure of the brightness of an object , measured in a specific wavelength or passband , usually in the visible or near - infrared spectrum . An imprecise but systematic determination of the magnitude of objects was introduced in ancient times by Hipparchus .
An imprecise but systematic determination of the magnitude of objects was introduced by which Greek astronomer, geographer, and mathematician?
An imprecise but systematic determination of the magnitude of objects was introduced by which Greek astronomer , geographer , and mathematician ?
Hipparchus
Hipparchus