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 ...

Since antiquity, the sky has been thought of as a bowl, or celestial sphere, that's directly overhead. The equatorial coordinate system that astronomers use to find stars and other objects is based on ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Historical view of the temporary ...