Home > Astronomy > Scale of Earth, Sun, Galaxy, and Universe

How many planets typically surround one star?

Answer 1

No one knows.

There are currently only a few thousand known extrasolar planets, and our current technology does not allow us to observe them in the same way that we would a planet within our own solar system.

The probability of intelligent life existing elsewhere in the universe is within the likelihood of life existing on many other planets in probably every galaxy (300 billion) in the universe, which is almost a given statistically.

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Answer 2

Luke Allen

A star's planetary system comprises one to eight planets on average, though the precise number can vary based on the star's age and size, as well as the dynamics of its planetary system.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.