Transit, in astronomy, the passage of one celestial body across the disc (face) of a larger, more distant body, or across the observer's meridian.
Year, a unit of time. It is based on the time it takes the earth to make one revolution around the sun. See more »
Zenith, the point in the heavens that is directly above the head of the observer. See more »
Zodiac, an imaginary belt in the sky extending some 8 on either side of the ecliptic, the apparent annual path of the sun among the stars. See more »
Zodiacal Light, a faint glow that appears along the zodiac above the western horizon after sunset and above the eastern horizon before sunrise. See more »