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How do observations of distant supernovae show that the expansion of the Universe is accelerating?

Answer 1

Hazel Asher

Type !A super nova can be used as standard candle
So with this we can measure distance to galaxy.

This method of accelerating the universe has been demonstrated by the observation of distant galaxies.

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Answer 2

Hailey Alvarez

The finding that Type Ia supernovae in distant galaxies are fainter than expected, indicating they are further away than predicted by a decelerating expansion model, suggests that the expansion rate of the Universe is increasing over time, and observations of distant supernovae show that the expansion of the Universe is accelerating.

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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.