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Cold Hydrogen Clouds Reveal Galaxy's Black Hole Activity Surge

7/18/2025

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Summary

Story summary

Cold hydrogen clouds have been uncovered within the Fermi bubbles, towering structures surrounding the Milky Way's core, thanks to researchers at the Green Bank Telescope. This exciting discovery hints at a recent explosion from the galaxy's central black hole, revealing that its activity may have surged in the last few million years, challenging previous assumptions.

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Story summary

Cold hydrogen clouds have been uncovered within the Fermi bubbles, towering structures surrounding the Milky Way's core, thanks to researchers at the Green Bank Telescope. This exciting discovery hints at a recent explosion from the galaxy's central black hole, revealing that its activity may have surged in the last few million years, challenging previous assumptions.