The moon's period of revolution with reference to the sun is1. equal to one solar month2. equal to one sidereal month3. equal to one synodic month4. none of these
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Which comet appears every 76 years?1. Hailey's2. Holme's3. Donati's4. Alpha Centauri
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On the surface of the moon, the1. mass and weight become lesser2. mass remains constant and only the weight is lesser3. only the mass is lesser4. mass and weight both remain unchanged.
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What is the unit of measurement of the distances of stars from the earth?1. light year2. fathoms3. nautical miles4. kilometers
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How much of the surface of the moon is visible from the earth?1. more than 75%2. only about 40%3. about 59%4. about 65%
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One Astronomical Unit is the average distance between1. Earth and the Sun2. Earth and the Moon3. Jupiter and the Sun4. Pluto and the Sun
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What is the relationship between solar day and sidereal day?1. Both are equal2. Solar day is longer than sidereal day3. Solar day is shorter than sidereal day4. There is no relationship between the two
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What is the International Date Line?1. It is the equator.2. It is the 0° longitude.3. It is the 90° east longitude4. It is the 180° longitude.
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The rate of rotation of the earth on its axis is highest on1. January 32. December 223. July 44. It never changes