Universe: MCQs from 41 to 50

41. The visible part of the Sun is called ______?

(a) Troposphere

(b) Ionosphere

(c) Photosphere

(d) Hydrosphere

42. When and by whom were the rings of Saturn discovered ______?

(a) Galileo, 1610

(b) Tycho Brahe, 1590

(c) Edmund Halley, 1682

(d) Isaac Newton, 1682

43. Light takes nearly four (04) years to reach us from the nearest star. What is the distance between that star and the Earth ______?

(a) 3.18X10¹⁶ m

(b) 2.18X10¹⁶ m

(c) 2.58X10¹⁶ m

(d) 3.78X10¹⁶ m

44. “Galileo Satellites” named after their discoverer, are four (04) large moons of the planet ______?

(a) Jupiter

(b) Uranus

(c) Neptune

(d) Saturn

45. Titan, the largest moon in the Solar System, is also the largest moon of ______?

(a) Uranus

(b) Jupiter

(c) Saturn

(d) Mars

46. Who was the first (1st) to speculate that Venus is completely covered with clouds ______?

(a) Christian Huygens

(b) Descartes

(c) Giordano Bruno

(d) Copernicus

47. Who was the first (1st) to determine that the day on the Mars was, like ours, roughly twenty-four hours long ______?

(a) Christian Huygens

(b) Isaac Newton

(c) Giordano Bruno

(d) Copernicus

48. How long does a sun-ray take to travel from the Sun to the Earth ______?

(a) 390 sec

(b) 440 sec

(c) 498 sec

(d) 600 sec

49. The comet, named after Edmund Halley, reappears after a time interval of every ______?

(a) 46 years

(b) 76 years

(c) 106 years

(d) 146 years

50. A Comet ______?

(a) Has a tail always pointing away from the Sun

(b) Has no tail at all

(c) Has a tail always pointing towards the Sun

(d) Has a tail, sometimes pointing towards the Sun and sometimes away from it