Take a walk on the beach. Pick up a handful of sand. How many grains are there? Imagine, the total amount of grains of sand there are in the whole world, now double it. Double it again, and again....
We will not know that answer until greater technology has been made and that maybe until a long time. We do know there is 8 planets, 1 dwarf planet and many moons in our milky way though. There would...
Short answer: We don't know. At least 200, by last count. More complete answer: It's beginning to look as if planets and planetary systems may be the norm rather than the exception. There are 300+...