Questions

In your opinion, what might be the future of the universe: open, flat, or closed? Explain your answer with suitable arguments.

Explain the concept of a flat universe.

Earth revolves around the Sun; the Moon revolves around the Earth. They have their force of gravity as well as the gravitational force between them, but they never collide with each other. Clarify this with reasons.

Write the importance of gravitational force in the position of celestial bodies in the universe.

According to the Big Bang theory, the universe is continuously expanding. Are there no limitations to the expansion of the universe? Explain your arguments.

Write the conclusion of Hubble's study.

State the Big Bang theory.

What is the universe?

Celestial bodies continue to remain in their own place. How?

As the distance between celestial bodies increases, their separating speed increases. Explain.