1) The diameter of the lens of the largest telescope is a. 5 m b. 8.5 m c. 10.4 m d. 12.2 m
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2) The stars of the galaxy are continuously moving around the a. center of sun b. center of galaxy c. center of milky way d. all of above
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3) After every eleven years, the rate of sunspots on the surface of sun is a. decreasing b. increasing c. lowering d. isolating
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4) The mass of 'Sirus A' is a. 1.5 times of the Sun b. 1.8 times of the Sun c. 2.3 times of the Sun d. 2.5 times of the Sun
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5) After Big Bang, the period which Solar system took for coming into being was about a. 9 thousand years b. 18 thousand years c. 9 billion years d. 18 billion years
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6) When energy is produced, a gas emits. This gas is called a. helium gas b. hydrogen gas c. nitrogen gas d. oxygen gas
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7) American space probe has been studying sun since a. 1995 b. 1996 c. 1997 d. 1998
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8) A huge bulge is kept heating up until hydrogen gas begins to convert into a. nitrogen gas b. oxygen gas c. helium gas d. argon gas
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9) In fact our earth is just a tiny speck in a vast a. space b. universe c. galaxy d. solar system
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10) Besides energy, the explosions on the sun also produce a. radiations b. electromagnetic waves c. sounds d. friction
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11) Waves travel through space at the speed of light i.e. a. 30,000 km/s b. 300,000 m/s c. 3,000 m/s d. 300,000 km/s
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12) Small radio telescopes are used instead a. enormous dish aerial b. reflecting telescopes c. refracting telescopes d. small dish aerial telescopes
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13) Scientists says that there is no proof that astrology has been used for prediction of a. human behavior b. myths c. future d. life span
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14) A telescope that uses a single or a combination of curved mirrors, is also called a. refracting telescopes b. reflector c. rarefaction telescope d. reflection telescope
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15) The sun is a glowing ball of hot gases which rotates in a. space b. earth c. ovals d. circles
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16) Ancient name of constellations refer to a. 77 areas b. 88 areas c. 99 areas d. 66 areas
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17) The 'sun' is about a. 5,000 years old b. 5 million years old c. 5 billion years old d. 5 trillion years old
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18) In a plane mirror, light is reflected through a. eyepiece lens b. convex lens c. concave lens d. light mirror
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19) Which is the most common type of galaxy in the universe? a. spiral galaxy b. irregular galaxy c. elliptical galaxy d. regular galaxy
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20) The rarest type of the 'galaxy' is a. peculiar galaxy b. lenticular galaxy c. irregular galaxy d. spiral galaxy
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