These facilitate us to a very large extent in the television, telephone and radio communication. With the help of some satellites, scientists have come to know a lot about different galaxies, stars, planets, dwarfs, neutron star and black holes etc.
Correct Answer
These facilitate us to a very large extent in the television, telephone and radio communication. With the help of some satellites, scientists have come to know a lot about different galaxies, stars, planets, dwarfs, neutron star and black holes etc.