After the sun, which of the following star is nearest to our earth planet?
a) Sirus
b) Alpha Centauri
c) Aries
What is light years
distance between the earth and 2nd closest star (Alpha Centauri)?
a) 1
b) 2
c) 3
d) 4.5
The distance between the earth and the most distant known object in the universe is ………billion light years.
a) 2
b) 3
c) 20
d) 32
Galaxy:
A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The word is derived from the Greek galaxias, literally 'milky', a reference to the Milky Way galaxy that contains the Solar System.
Which
of the following is/are collectively form/s a galaxy?
a) dust and gases
b)
stars
c) solar systems
d) all of these
There are thought to be over……….galaxies in the observable parts of the universe.
a) millions
b) billions
c) trillions
d) thousands
