Page 17 - Fizzy Science Corner

51. At how mush speed Moon moves across the Sun?
2,250 km per hour.
52. How long a solar eclipse can last?
7 and a half minutes.
53. What is the Equatorial Circumference of Earth?
40,030 km.
54. What is Earth’s surface temperature?
-88 to 58°C.
55. When was the Earth formed?
approximately 4.54 billion years ago.
56. How many natural satellites of Earth are there?
one, Moon.
57. What are the notable satellites of Mars?
Phobos & Deimos.
58. Which planet has approximately the same landmass as Earth?
Mars.
59. What are the notable satellites of Pluto?
Charon, Nix, Hydra, Kerberos and Styx.
60. When was the Pluto reclassified from a planet to a dwarf planet?
in 2006.
61. How many stars are there in Andromeda Galaxy?
1 trillion.
62. At which speed the Andromeda Galaxy is approaching the Milky Way?
at approximately hundred to hundred and forty kilometers per second
63. The planet Neptune, discovered in 1846 and yet to complete its circuit, will be back at the position
where it was first observed until the year– 2011
64. The planet Jupiter takes about ........................ to complete one revolution in its orbit around the Sun.
65.86 years
66. The biggest star in our galaxy is–
Proxima Centauri
67. The nearest star to Earth (excepting the Sun) in our galaxy is–
Proxima Centauri
68. Who was the first to observe Sun spots?
Galileo
69. Why is it very difficult to observe the planet Mercury most of the time?
The glare of the Sun usually keeps it hidden, it being too close to the Sun
70. Name the two planets which appear as ‘morning star’ in the eastern sky and ‘evening star’ in the
western sky–
Mercury and Venus
71. Name the two planets lying between the Sun and the Earth