Just how many galaxies is an infinite number, anyway? NASA photos.

 

                         So many planets, so much diversity! Can life really be limited to Earth?

The galaxies you'll view during your journey to the beginning of the universe are like grains of sand on the beach, or snowflakes, with no two galaxies looking exactly the same to viewers. Astronomers have also viewed a number of different types of galaxies on the human journey to the beginning of the universe that they...