1
The number of galaxies in universe is about......million galaxies
2
The building units of the universe are............
3
The universe contains........
4
Galaxies are formed of groups of.........
5
Galaxies gather in groups known as......
6
.......are located in the spiral arms of Milky Way galaxy
7
.......is the star of our system
8
The sun and the surrounding planets revolve around the centre of the........
9
The solar system consists of the sun and ......planets rotate around the sun
10
The solar system is located in one of the.......arms of the Milky Way galaxy
