Introduction

• Look into night sky, what lies above is the universe:

• - space, galaxies, everything in it (possible life forms/ intelligence that may exist).

• Possible- a number of worlds scattered throughout the cosmos, similar to Earth.

• According to Einstein:

• “You cannot touch, see and feel the universe, the universe is not simply emptiness; but is a real stretchable & flexible thing.”

• Einstein predicted (but did not believe it):

• Expansion of space is predicted by the “Theory of Relativity”.