Piyush Maan's post on Goodwall - Imagine this, the pictures of the stars that we are seeing today are so far from us that even light takes years for the image of the star to reach us. For example, the image of a star 100 light years away that we see today is how the star/any celestial body was 100 years ago. Imagine what would have become it now!? Isn't it fascinating!!! Imagine if we could use such technique to look back in time!