Thank you for saving the universe Go out and look at the night sky. It's not dark yet? Ah, come inside and wait for the earth’s rotation to swirl your part of the land to the far side of the earth Now, look towards the south. Tilt your head just a little to the left. Do you see that super bright dot? That’s Sirius - the brightest star in our night sky (not to confuse with the northern star or “Dhruv”). That star is about 8.6 light years away from us. In more cooler words that means the photons which are hitting your eyes left the core of the star 8.6 years ago - not bad right ? Now make a straight but cross line from sirius to your right side. You will see Rigel below the orion's belt (the three stars that look cute and great). That star is 862 light year away from us so the light hitting your retina left the core of the star - you guessed it ! - freaking 862 years ago. Now imagine a dark time when ideas weren’t promoted - the medieval time - the time when you would hav
