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

How many stars/galaxies are there?

Answer 1

Levi Anderson

200 to 400 billion stars in our galaxy Milky way

There are two trillion galaxies in the universe.

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Answer 2

Luke Allen

It is estimated that there are between 100 billion to 200 billion galaxies in the observable universe. Each galaxy can contain billions to trillions of stars. Therefore, the total number of stars in the universe is estimated to be in the order of magnitude of trillions to hundreds of trillions.

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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.