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Dr. Victoria Grinberg (vicgrinberg@mastodon.social)'s status on Wednesday, 15-Nov-2023 23:50:59 JST Dr. Victoria Grinberg

Typically, the only cosmic things that disturb the "sunny side" of Earth's atmosphere come from our closest star, the Sun.
Except, it turns out, if you get a very bright GRB, the brightest we ever detected. And suddenly a star, exploding 2 billion light-years away (the Sun is just 8 minutes light away!) can - just temporarily, for a few minutes, but still - affect the Earth's ionosphere (and possibly the ozone layer).
More:
▶️ https://www.esa.int/Science_Exploration/Space_Science/Integral/Blast_from_the_past_gamma-ray_burst_strikes_Earth_from_distant_exploding_star
▶️ https://www.science.org/content/article/cosmic-blast-seared-earth-s-atmosphere-2-billion-light-years-away
#astrodon
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  Blast from the past: gamma-ray burst strikes Earth from distant exploding star
  
  An enormous burst of gamma rays, detected by ESA’s Integral space telescope, has struck Earth. The blast caused a significant disturbance in our planet’s ionosphere. Such disturbances are usually associated with energetic particle events on the Sun but this one was the result of an exploding star almost two billion light-years away. Analysing the effects of the blast could provide information about the mass extinctions in Earth’s history.
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