sciences astronomy

GeoDirectory

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

Tatasurya

Tatasurya

Planets, science, refrencess

Wcs - the home of webcamscheinern

Wcs - the home of webcamscheinern

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