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How can we see objects outside our galaxy?

Answer 1

Only very large telescopes can resolve individual stars in other galaxies.

The light from distant galaxies is very faint, so large telescopes with long time exposure will give good photographs of Galaxies. Resolving power is related to aperture and wave length. Large ground-based or space-based telescopes are used to photograph other galaxies and stars are resolved.

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Answer 2

Owen Atkinson

We can see objects outside our galaxy using telescopes. Telescopes collect light from distant objects, allowing us to observe them. Some objects outside our galaxy, like other galaxies, stars, and nebulae, emit light that can be detected by telescopes. Additionally, telescopes equipped with advanced instruments can capture various wavelengths of light, including infrared and radio waves, providing further insights into objects beyond our galaxy.

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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.