Meteorite, a meteor that reaches the earth's surface. Meteors are naturally occurring objects that enter the earth's atmosphere from space, traveling at high speed.
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 »