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Are there other planets in space, other than the ones we know?
Question Date: 2016-09-23
Answer 1:

Great question. Scientists think there are at least 10 billion planets in our galaxy alone. As you might already know, our solar system consists of a sun with eight planets and we are located in the milky way galaxy. There are likely 1,500 planets within 50 light years of Earth.

In the milky way galaxy alone, there are an estimated 200-400 billion stars like our sun. Some are bigger and some smaller, but it is observed and understood that most stars are likely to have planets than not have planets. A lower estimate on the number of galaxies in the observable universe is around 200 billion, meaning that there are at least 1,000,000,000,000,000,000,000,000 planets in the observable universe.

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