1. The constellations of stars appear at different positions in the sky at different times
during night mainly:
a) because earth rotates about its axis
b) because earth revolves round the sun
c) because of optical illusion
d) because celestial bodies are changing their positions all the time
2. If there is no Sun, the colour of the sky would be:
a) orange
b) blue
c) yellow
d) black
3. The Saturn rings were discovered by:
a) Copernicus
b) Newton
c) Galileo
d) none of these
4. The 'Solar Corona' mainly consists of:
a) cosmic rays
b) molten lava
c) gases
d) ice
5. Comets are celestial bodies moving about the solar system in
a) elliptical or hyperbolic orbits, usually accompanied by a shining tail
b) elliptical orbits usually accompanied by a long shining tail
c) hyperbolic orbit always accompanied by a shining head
d) hyperbolic orbit without projecting any tail or head
6. Foucault experiment is proof of which one of the following? [NDA 2008
a) Revolution of Earth
b) Rotation of Earth
c) Rotation of Moon
d) Revolution of Moon
7. The radiant energy of the sun is transmitted in the form of:
a) short waves
b) long waves
c) particles
d) none of these
8. While Venus is seen only for one to two hours either after sunset or before sunrise,
Jupiter is seen for the whole night whenever it is visible in the sky. The reason for this
is that:
a) Venus is much smaller than Jupiter
b) Venus is much closer to the earth than Jupiter
c) the orbit of Venus is inside the earth's orbit whereas the orbit of Jupiter lies outside the
orbit of the earth
d) Venus reflects lesser amount of sunlight than Jupiter
9. Which of the following statements is/are correct with regard to Milky Way?
1. It is a spiral galaxy.
2. The solar system resides in one of its spiral arms.
Select the correct answer using the codes given below
a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2
10. Among the following which planet takes maximum time for one revolution around the
Sun?
a) Earth
b) Jupiter
c) Mars
d) Venus