After the sun, the next nearest star to the Earth is:
(a) Alpha Centauri
(b) Pole Star
(c) Sirius
(d) Proxima Centauri
Tarun got to know from his elder brother that sun is the nearest star and is approximately 150 million kilometers away from the earth. He wanted to know which is the next nearest star and what is its distance from the earth. His tutor told him that the nearest star is alpha century and is at a distance of 4.3 light years from the earth. Tarun does not know what a light year is. Can you tell him?