Synonyms: celestial longitude, right ascension, RA
Definition: (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
Usage: one hour of right ascension equals fifteen degrees
Similar words: angular distance
Definition: the angular separation between two objects as perceived by an observer
Usage: he recorded angular distances between the stars
Definition: 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
Similar words: Egyptian deity
Definition: a deity worshipped by the ancient Egyptians
Synonyms: Ra, radium, atomic number 88
Definition: an intensely radioactive metallic element that occurs in minute amounts in uranium ores
Similar words: metal, metallic element
Definition: any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.