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sciences astronomy


Speed of light

Speed of light *

From general relativity we know that only in local inertial frames does the measured speed of light equals the nominal speed of light (299792.458km/sec).

Astronomy in service of islam

Astronomy in service of islam *

Moonsighting, islamic calendar, prayer times, and qibla direction



Planets, science, refrencess

Wcs - the home of webcamscheinern

Wcs is a software for fast polaralignment of astronomical mounts. you nail your alignment within 20 minutes!