Halley's Comet

Halley's Comet, Comet Halley, ko kuma wani lokacin kawai Halley, wanda aka keɓe a hukumance 1P/Halley, wani ɗan gajeren lokaci ne mai tauraro mai wutsiya da ake iya gani daga Duniya a kowace shekara 75-79. Halley ita ce tauraro mai wutsiya daya tilo da aka sani na gajeren lokaci wanda ake iya gani a kai a kai ga ido tsirara daga doron kasa, don haka ita kadai ce tauraruwar ido tsirara da ke iya bayyana sau biyu a rayuwar dan Adam. Ya bayyana a ƙarshe a sassan ciki na Tsarin Rana a cikin 1986 kuma zai bayyana a tsakiyar 2061.https://archive.today/20170806105801/http://www.smithsonianmag.com/history/ten-notable-apocalypses-that-obviously-didnt-happen-9126331/

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Halley's Comet ita ce kawai sanannen ɗan gajeren lokaci wanda ake iya gani da ido daga Duniya,  yana bayyana a kowace shekara 72-80,kodayake tare da mafi yawan abubuwan da aka rubuta (25 na 30) da ke faruwa bayan shekaru 75-77. Ya bayyana na karshe a cikin sassan ciki na Tsarin hasken rana a cikin shekarar alif 1986 kuma zai bayyana a tsakiyar shekarar 2061. An sanya shi a hukumance 1P / 1P/Halley', ana kiransa Comet Halley''',ko kuma wani lokacin kawai Halley. 

An lura da dawowar lokaci-lokaci na Halley zuwa Tsarin hasken rana na ciki kuma an rubuta shi ta hanyar masu binciken taurari a duniya tun aƙalla 240 BC,amma har zuwa shekarar alif 1705 ne masanin tauraron dan adam na Ingila Edmond Halley ya fahimci cewa waɗannan bayyanar sun sake bayyanawa ne na wannan comet. A sakamakon wannan binciken,an sanya sunan comet din bayan Halley.

A lokacin ziyarar daya kai a shekarar alif 1986 zuwa tsarin hasken rana na ciki, Halley's Comet ya zama comet na farko da za a lura dashi dalla-dalla ta Jirgin sararin samaniya, Giotto'',yana bada bayanan kallo na farko game da tsarin tsakiya na comet da kuma tsarin coma da kuma kafa wutsiya. Wadannan abubuwan lura sun goyi bayan ra'ayoyi da yawa game da ginin comet, musamman samfurin "dirty snowball" na Fred Whipple, wanda yayi hasashen cewa Halley zai kasance da cakuda mai saurin gudu - kamar ruwa, carbon dioxide, ammoniya - da ƙura. Ayyukan sun kuma samar da bayanan da suka sauya da sake fasalin waɗannan ra'ayoyin; alal misali,yanzu an fahimci cewa farfajiyar Halley ta ƙunshi ƙura, kayan da basa tashi, kuma karamin ɓangaren ne kawai.