betelgeuse still hasn't gone back to normal after the 2019 dimming
- In 2019 Betelgeuse dimmed to about 40% brightness due to a dust cloud it expelled, not a supernova. - The star’s long-standing pulsation cycle altered during that event and has not returned to its previous pattern. - Astronomers continue to debate the cause and implications of the persistent changes. - At ~700 light-years away, we see Betelgeuse as it was centuries ago, so its current true state (or whether it has already exploded) is unknown.
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