Which of the following has been improved due to the artificial satellite?
a) telecommunication
b) weather forecasting
c) both a and b
d) none of them
Exercise:
The distances in space are measured in…….
a) metres
b) miles
c) light years
d) kilometres
Milky way is classified as………
a) spiral galaxy
b) elliptical galaxy
c) irregular galaxy
d) spherical galaxy
With no or very little star formation, galaxy is called…….
a) spiral
b) elliptical
c) irregular
d) spherical
When the mass of star is equal to our sun, it will turn into…….
a) white dwarf
b) neutron star
c) black-hole
d) singularity
