Universe

(a) Cosmic year
(b) Astronomical year
(c) Light year
(d) Parsec

(a) Cosmology
(b) Cosmography
(c) Astronomy
(d) None of these

(a) Moon and earth have gravitational force
(b) Moon cannot change its position
(c) The period of rotation of the moon on its axis and period of revolution around the earth is almost the same
(d) None of these

(a) Size
(b) Temperature
(c) Mass
(d) Density

(a) Because earth rotates about its axis
(b) Because earth revolves around the sun
(c) Because`of optical illusion
(d) Because celestial bodies are changing their position

(a) Aurora australis and aurora borealis
(b) Magnetic storms on the surface of the sun
(c) Polar auroras
(d) All of these

(a) Density of stars
(b) Orbital velocity of giant stars
(c) Astronomical distance
(d) None of these

(a) 3 light-years
(b) 4.24 light-years
(c) 5 light-years
(d) 6 light-years

(a) The sun’s orbit is not always in the same plane as the moon
(b) The moon’s orbit is not all the time in the same plane as the earth
(c) The moon revolves at a slower speed than the earth
(d) None of these

(a) Mars
(b) Venus
(c) Moon
(d) Sun