In late November 2025, astronomers captured an unprecedented cosmic signature: the first X-ray emissions ever detected from ...
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3I/ATLAS emits X-rays after 400,000km halo forms
The interstellar comet 3I/ATLAS has just done something no confirmed visitor from another star system has ever been seen to do, lighting up in X-rays after developing a vast halo roughly 400,000 km ...
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