Cosmic rise

The terms cosmic rise and cosmic set define in astronomy the simultaneous rise of a celestial object with the sunrise and the simultaneous setting with the sunset.

A distinction must also be made between the true cosmic rising and the apparent cosmic rising and the true cosmic setting and the apparent cosmic setting :

• Because of the refraction , the apparent cosmic rise of a star occurs before the true cosmic rise on the horizon .
• On the other hand, the apparent cosmic downfall takes place after the true cosmic downfall.

Due to the brightness of the sun , cosmic rises and sets are normally not observable.

See also

• Acronyms rise
• Heliac rise

literature

• Christian Leitz : Ancient Egyptian star clocks . Peeters, Leuven 1995, ISBN 9-0683-1669-9
• Alexandra von Lieven : Plan of the course of the stars - The so-called Nutbuch - , The Carsten Niebuhr Institute of Ancient Eastern Studies, Copenhagen 2007, ISBN 978-87-635-0406-5