When the first man (Neil Armstrong) to step on the surface of the moon?
a) 20th July, 1969
b) 20th Jun, 1979
c) 20th May, 1989
d) 20th august, 1999
Countless shining lights seen at night on the sky are………
a) stars
b) moons
c) planets
d) different heavenly bodies
How long does it take for a geo-stationary satellite to complete one orbit?
a) one day
b) one weak
c) one month
d) one year
