How can we see other galaxies from earth?

Answer 1

Galaxies are very large objects and they have large angular diameter. There is nothing that blocks light from galaxies to earth.

The Andromeda galaxy, the closest spiral galaxy, is visible to the unaided eye and measures 3.1 degrees by 1 degree in angular size, while the Sun is only 30 arc minutes, or half a degree. Telescopes are needed to view other galaxies.

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Answer 2

Ariana Acosta

We can see other galaxies from Earth using telescopes, both ground-based and space-based. Telescopes collect and magnify light, allowing us to observe objects that are very far away, including galaxies. These telescopes capture light from distant galaxies, enabling astronomers to study their structures, movements, and compositions.

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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.