Sphere

Under Sphaerics is understood since ancient Greek times the doctrine of geometric elements on the ball (Greek Sfaira ). The most important sub-area of ​​the sphere is spherical trigonometry .

The term has generally been abandoned in the last few decades, but is used in individual disciplines, e.g. B. in astrognosy , still used.

To include important representatives of the field in antiquity

• the astronomer Theodosios of Bithynia
• the mathematician Menelaus
• as well as Autolykos by Pitane

and in modern times among other things

• Johannes Vögelin ,
• Paul hide and
• Oswald Thomas .

See also:

• Spherical astronomy
• Meteor astronomy

literature

• RM Green: Spherical Astronomy , Cambridge University Press, Cambridge 1985, ISBN 0-521-23988-5 and ISBN 0-521-31779-7
• Oswald Thomas on spheres and astronomy . In 100 years of the Astronomical Office , H. Mucke 2007, astroverein.at