Astronomy questions

1) Astronomers have used the idea of a celestial sphere as a model for the night sky. Please give a brief description of the following parts of the celestial sphere.a. Celestial Equatorb. Celestial Polec. Eclipticd. Northern Celestial Hemisphere2) Where can we find...

Astronomy questions

1.Discuss the big bang theory of the universe.2.Why do we believe the Universe had a beginning?3.What is the evidence that the Universe is expanding?4.What is dark energy and how is that related to what the Universe looks like and what will happen to it in the...