Tag: big bang

The expansion of the universe

January 31, 2022

The light year or unit of light is the unit we usually use to describe the distances between stars and galaxies. But given the size of the universe, the unit of light year is not enough. The unit used for this is Megaparsec. One Megaparsec is 32,60,000 Light years. This is a very large distance….

The rotation of the earth

November 15, 2021

Why does the earth rotate on its own axis? Why does it revolve around the sun? Why does it not collide with the sun? Answer .When the earth was formed, it rotated and revolved around the sun. According to Newton’s first law, an object sitting idle in the absence of any other force would remain…