Download Astronomy 101: Understanding Celestial Bodies and Their Movements and more Quizzes Astronomy in PDF only on Docsity! TERM 1 What is the horizon? DEFINITION 1 An imaginary line that separates the half of the sky you can see from the half of the sky you can't see. TERM 2 How much of the sky is visible at any given time? DEFINITION 2 Half TERM 3 People located at the ___ can see all the stars over the course of the day DEFINITION 3 Equator TERM 4 Stars move parallel to the ____. DEFINITION 4 Celestial equator TERM 5 Stars rise in the ____ & set in the ____. DEFINITION 5 East, West Stars rise in the East & set in the West. TERM 6 The point in the sky directly overhead. DEFINITION 6 Zenith TERM 7 The imaginary circle through the celestial poles. DEFINITION 7 Meridian TERM 8 Stars that never rise nor set but are always visible. DEFINITION 8 Circumpolar star TERM 9 Stars that are never visible are located... DEFINITION 9 Below your horizon TERM 10 If you are exactly at the N or S pole, __ of the sky is visible. DEFINITION 10 Exactly half TERM 21 Thirteen Zodiac constellations: DEFINITION 21 Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpius, Ophiuchus, Sagittarius, Capriconus, Aquarius, Pisces. TERM 22 The amount of time it takes the Earth to rotate exactly 360 degrees DEFINITION 22 Sidereal day TERM 23 How many hours does it take the Earth to rotate 360 d. (Solar time)? DEFINITION 23 Slightly less than 24 hours TERM 24 Are the sun, major planets, and Earth's orbits in similar planes? DEFINITION 24 Yes TERM 25 The slow change in the direction that the Earth's rotation axis makes compared to the stars DEFINITION 25 Precession TERM 26 Which location experiences the smallest amount of change in sunlight over the yr? DEFINITION 26 The equator TERM 27 TorF. Only 1 side of the moon is visible at all times. DEFINITION 27 True TERM 28 Which phase of the moon occurs when the moon is on the same side of the Earth as the Sun? DEFINITION 28 New Moon TERM 29 Which phase of the moon occurs when the moon is on the opposite side of the Earth from the Sun? DEFINITION 29 Full Moon TERM 30 The length of time between a repeat of a moon phase. DEFINITION 30 Synodic period TERM 31 The synodic period of the Moon is ___. DEFINITION 31 29.5 days TERM 32 The synodic period of the moon is the time required for the moon to ___. DEFINITION 32 return to the same phase once. TERM 33 The ____ & ____ periods of the Moon are equal which is why we always see the same side of the moon. DEFINITION 33 orbital, rotational TERM 34 The synodic period of the Moon is longer than the orbital period because ________. DEFINITION 34 The Earth orbits the Sun counter-clockwise and the Moon orbits the Earth counter-clockwise TERM 35 If the moon is in last quarter (third quarter) it rises and sets at ____ & ____. DEFINITION 35 midnight, noon
