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What is the largest star in the universe?

What is the biggest star in the entire universe?


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If we disregards the fact that we do not know the entire universe and focus only on the known part of it, there are still high uncertainties in defining sizes of stars. Their distances are also uncertain which affects the estimation of their sizes. Measurement is hindered by the dust shells embedding them or their pulsation. So, if we focus on what could be measured until now, the largest known star is VY Canis Majoris. It is more than 1000 times bigger as our Sun.

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