Do You Know Events History

9 Feb : You can see Hailey’s Comet once in your lifetime

– Hailey’s comet was last seen today in 1986.

– This was the 30th time that this comet could be seen in our solar system.

– The 31st time we can see it in 2061.

– It is the only naked-eye comet that might appear twice in a human lifetime.

– Halley’s Comet is a short-period comet visible from Earth every 75–76 years.

– Halley’s returns to the inner Solar System have been observed and recorded by astronomers since at least 240 BC.

– Clear records of the comet’s appearances were made in last 3 decades.

– The appearances were not recognized as reappearances of the same object at the time.

– The comet’s periodicity was first determined in 1705 by English astronomer Edmond Halley, after whom it is now named.

– Halley was the first comet to be recognized as periodic.


1986 में आज Halley’s Comet को हमारे सौर मंडल में आखिरी बार देखा गया था। ये तीसवीं बार था जब Halley’s comet को इस तरह से देखा गया था। अगली बार Halley’s Comet 2061 में देखा जा सकेगा। Halley’s ऐसा comet है जिसे हर 75-76 साल के बीच बिना telescope के भी आकाश में देखा जा सकता है। पिछले तीन दशकों में इस comet के दिखने के प्रमाण मौजूद हैं। ये इकलौता ऐसा comet है जो एक ही जीवनकाल में दो बार देखा जा सकता है।

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