The Andromeda galaxy is approximately 2.5 million light years from Earth and for the past 134 years, it has been the one of the most-observed galaxies by astronomers. This is why it’s surprising that a recent oxygen nebula was uncovered by amateur astronomers Marcel Drechsler and Xavier Strottner – an arc almost as large as the galaxy itself, that hadn’t been discovered until now. To verify their claim, the duo enlisted French amateur astronomer Yann Sainty to help out.
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