3 docs tagged with "right ascension"

Right ascension and declination, measured from the celestial equator — the astronomer's frame, and the one the sky's daily turn makes natural.

One angle, written two ways. Star catalogues quote hours because the sky turns once a day; Aquila and Compass quote degrees. Fifteen degrees to the hour.

Signs are divisions of the ecliptic. Right ascension is measured around a different circle, so a sign name attached to it names nothing — which is why the applications withhold them.