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Mohammad šš©
@mohammed1990
Halley's Comet is visible to the naked eye from Earth once every 75-76 years. But before studying this comet, scientists did not know that comets can have a regular orbit. Have you ever seen a comet in the night sky?
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Andishe š© š šµ šš
@hassanandishe
Yes, I see it a lot. šš
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