Solar System
The Sun produces most of its energy by_____________?
A. Nuclear fusion
B. nuclear fission
C. Burning hydrogen
D. None of these
The time taken by Sun to revolve around the center of our galaxy is___________?
A. 150 million years
B. 250 million years
C. 300 millon years
D. 350 millon years
The Sun is at an average distance of about________ million kilometers away from Earth?
A. 100 million
B. 150 million
C. 200 million
D. 250 million
Which rays are trapped in our galaxy by magnetic waves?
A. Alpha rays
B. Gamma rays
C. Cosmic rays
D. None of these
According to Einsteins general theory of relativity the universe:________________?
A. Must be expanding
B. Must be contracting
C. Must be either expanding or contracting
D. Must be neither expanding nor contracting
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