Unscramble the following to match the columns:

State True (√) or False (X):

1. Sun is a biggest planet.
2. The idea of Sun-centric Solar system was introduced by Edmund Halley.
3. Uranus was discovered in 1781.
4. Universe is not static.

Fill in the blanks:

1. The nearest star to the Earth is ______________.
2. ______________ was discovered in 1846.
3. Our sun is the member of ____________ galaxy.
4. 1 light year is approximately equal to _____________ km.

Fill in the blanks:

1. The speed of light is _____________.
2. Dark patches on the Sun's surface are called ______________.
3. The two main constituents of the Sun are ______________ and _____________.
4. ____________ reactions take place in the core of the Sun.

State True (√) or False (X):

1. Volume of he Sun is 110 times the Volume of the Earth.
2. Helium is the major constituent of the Sun.
3. The radius of the solar system is more than 5900 x 106 km.
4. All big and small celestial bodies of the Solar System are held together by the Sun's gravitational force.