Star HD 7977 flew past the Sun millions of years ago and triggered a comet shower
New research from the Planetary Science Institute suggests that star HD 7977 passed close to our Sun millions of years ago, potentially triggering a wave of long-period comets from the Oort Cloud. Scientists say we are currently observing the final phase of that process. More precise data from the Gaia mission should soon allow researchers to verify the scenario.
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