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The findings could reveal the location of the missing matter of our universe.
A stunning round solar halo caused a social media frenzy – people were out in the streets, taking photos, sharing them, while scientists were also excited to see such a rare phenomenon. But what are solar halos, and why did this one appear in Mexico?
In an article published in the Astrophysical Journal last week, astronomers described a massive halo around the Andromeda Galaxy, extending up close to Earth. The team spotted the halo through NASA’s Hubble Space Telescope and consider it one of the galaxy’s most important features.