26. The rotation period of Earth is _____.
Correct Answer: B. 23 hours, 56 minutes, 40 seconds
Explanation: Earth rotates once on its axis in 23 hours, 56 minutes, 40 seconds (sidereal day).
27. Which planet is called the Evening Star?
Correct Answer: D. Venus
Explanation: Venus is called the Evening Star when it shines brightly in the west after sunset.
28. The nearest neighbour of Earth in the Solar System is _____.
Correct Answer: A. Venus
Explanation: Venus is the closest planet to Earth in terms of average distance.
29. Which planet is covered with red dust?
Correct Answer: C. Mars
Explanation: Mars, known as the Red Planet, gets its color from iron oxide (rust) on its surface.
30. The slowest rotatory planet is _____.
Correct Answer: B. Venus
Explanation: Venus has the slowest rotation in the Solar System, taking 243 Earth days to complete one rotation.
31. Planet with the shortest day is _____.
Correct Answer: D. Jupiter
Explanation: Jupiter has the shortest day in the Solar System, rotating once in about 9 hours, 50 minutes, and 30 seconds.
32. Which planet rotates from east to west, opposite to most other planets?
Correct Answer: D. Venus
Explanation: Venus rotates retrograde, from east to west, unlike most planets which rotate west to east.
33. The fastest spinning planet is:
Correct Answer: B. Jupiter
Explanation: Jupiter spins faster than any other planet, completing a rotation in under 10 hours.
34. Which planet has the longest day?
Correct Answer: B. Venus
Explanation: Venus has the longest day, with a rotation period of 243 days and 14 hours.
35. Which planet has a magnificent system of rings?
Correct Answer: C. Saturn
Explanation: Saturn is famous for its bright and extensive ring system.
36. Jupiter’s diameter is approximately ____.
Correct Answer: D. 11 times Earth’s diameter
Explanation: Jupiter is massive, with a diameter about eleven times that of Earth.
37. In 1610, who first looked at Saturn through a telescope?
Correct Answer: B. Galileo
Explanation: Galileo became the first person to observe Saturn through a telescope in 1610.
38. The second largest planet in the Solar System is:
Correct Answer: B. Saturn
Explanation: Saturn is the second largest planet after Jupiter.
39. Which planet can be seen with the naked eye when the sky is very dark and clear?
Correct Answer: A. Uranus
Explanation: Uranus can be seen without a telescope under dark, clear skies.
40. Neptune was discovered by ______.
Correct Answer: C. Johann Galle
Explanation: Neptune was discovered by the German astronomer Johann Galle.
41. Which Planet in the solar system has the largest year?
Correct Answer: D. Neptune
Explanation: Neptune takes the longest time to orbit the Sun, completing a year in about 165 Earth years.
42. Slowest revolving planet in the Solar System is _____.
Correct Answer: B. Neptune
Explanation: Neptune has the slowest revolution around the Sun, taking 165 years to complete one orbit.
43. Which planet in the solar system has the largest year?
Correct Answer: B. Neptune
Explanation: The largest year in the Solar System belongs to Neptune due to its great distance from the Sun.
44. Uranus was discovered by _____ in 1781.
Correct Answer: A. William Herschel
Explanation: William Herschel discovered Uranus in 1781, expanding the known boundaries of the Solar System.
45. Neptune’s revolution period is ___ years.
Correct Answer: C. 165
Explanation: Neptune takes 165 Earth years to complete one revolution around the Sun.
46. Which planet in the solar system is known as the twin of Uranus due to their similarity of size, mass, and composition?
Correct Answer: A. Neptune
Explanation: Neptune is considered the twin of Uranus because both planets share similar size, mass, and gaseous composition.