For many years UY Scuti was considered the largest known star in the universe. Then came along the behemoth that is Stephenson 2-18. But it turns out that measuring enormous, distant, bright stars isn't easy, and both UY Scuti and Stephenson 2-18, although very big, are probably not as big as initially thought. So by using the best measurements available, what is the current largest star in the known universe? Want to help support my channel and gain added perks? Join the community and become a V101 member or Patron Today - null https://www.patreon.com/V101Science​ Subscribe - null X (Twitter) - https://twitter.com/V101Space Facebook - https://www.facebook.com/V101Science​ Instagram - https://www.instagram.com/v101__science/