How many planets are there in the universe?

The space is mind bogglingly large. Our galaxy alone contains about 100 billion stars, and there could be trillions of galaxies in the universe. (And almost a trillion Certainly bigger than you think!) But do we know how many planets there are?

Astronomers have 5502 planets discovered around other stars (known as outer planets) in the Milky Way. Add the eight in our website Solar System (Not nine, sorry Pluto), and that gives us a total of 5,510 known planets, all located in our galaxy. Counting planets is a difficult task, however, astronomers are sure that there are plenty of other planets out there that we haven’t found yet.

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