RasWordNet Explorer

(astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere

the angular separation between two objects as perceived by an observer

the branch of physics that studies celestial bodies and the universe as a whole

ancient Egyptian sun god with the head of a hawk; a universal creator; he merged with the god Amen as Amen-Ra to become the king of the gods

the historic period preceding the Middle Ages in Europe

an intensely radioactive metallic element that occurs in minute amounts in uranium ores

any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.

any ore from which uranium can be extracted