The equatorial coordinate system projects Earth's latitude and longitude onto the celestial sphere, using declination (angular distance from the celestial equator, measured in degrees) and right ...

As a space scientist, every time I go outside with my family, I tell my children to look up at the sky. The front door of our home looks southeast, and on winter nights the constellation Orion hangs ...

Birth of astronomy -- Celestial sphere -- Some applications of spherics -- Calendars and time reckoning -- Solar theory -- Fixed stars -- Planetary theory -- Frequently used tables -- Appendix : ...