Why are recent observations of distant supernovae so important to cosmology?
Answers
A supernova can be used as standard candle to measure distance to very far away galaxies where individual stars can not be resolved.
Explanation:
Cepheid variables are standard candles.But when the galaxy is very far away we can not resolve individual stars.
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blindingly bright star bursts into view in a corner of the night sky — it wasn't there just a few hours ago, but now it burns like a beacon.
That bright star isn't actually a star, at least not anymore. The brilliant point of light is the explosion of a star that has reached the end of its life, otherwise known as a supernova.
Supernovae can briefly outshine entire galaxies and radiate more energy than our sun will in its entire lifetime. They're also the primary source of heavy elements in the universe. According to NASA, supernovae are "the largest explosion that takes place in space