Super Nova is _____.

1. 1. A dying star
   2. An asteroid
   3. A comet
   4. A black hole

The period of one revolution of sun around the Centre of galaxy is called _____.

1. 1. Astronomical year
   2. Light year
   3. Cosmic year
   4. Parsec

The Milky way extends through a distance of _____.

1. 1. 10⁵ light years
   2. 1 light year
   3. 8 light years
   4. 10¹⁰ light years

The light coming from stars gives the idea of their _____.

1. 1. Mass
   2. Temperature
   3. Size
   4. Rotation

The sunspots cause _____.

1. 1. Polar auroras
   2. Magnetic storms on the surface of the sun
   3. Aurora borealis and aurora australis
   4. All of these

‘A star which appears blue’ is _____.

1. 1. Hotter than the sun
   2. As hot as the sun
   3. Cooler than the sun
   4. Cooler than the moon

The outermost layer of Sun is called _____.

1. 1. Photosphere
   2. Chromosphere
   3. Corona
   4. Convection zone

Pole Star always seen at one point in the sky whereas other stars are not; this is because _____.

1. 1. Pole star lies in the axis of spin of the earth
   2. Sun and Pole star are in two opposite directions relative to earth
   3. Pole Star is a star of our won galaxy
   4. Pole star rotates with the same period as the earth

According to new scientific research water is present on the surface of _____ except earth planet.

1. 1. Venus
   2. Mercury
   3. Mars
   4. Jupiter

Some times the earth passes exactly between the moon and the sun this condition is known as _____.

1. 1. Solar eclipse
   2. Lunar eclipse
   3. Earth eclipse
   4. Noe of these