In a galaxy, stars are bound together by mutual
a) gravitational attraction
b) bonding
c) attraction
d) all of these
Which of the following structures are the basic units of the universe?
a) planets
b) galaxies
c) asteroids and comets
d) stars
Our sun is the member of ……….
a) milky way
b) Andromeda
c) NCG 1569
d) ESO-305-G004
How many estimated stars are present in our galaxy (Milky Way)?
a) 2 million
b) 20 million
c) 200 million
d) 2 billion
How many
galaxies are present in our universe?
a) billions/trillions
b) million
c) thousands
d) hundreds
How much time would take a modern jet fighter to reach the nearest star to the sun?
a) more than million years
b) half million years
c) 200 thousandyears
d) 2 billion years
