In 1181 AD, a bright "guest star" was observed to linger in the sky for around six months. Nearly 850 years later, the likely ...
Morning Overview on MSN
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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