K2-18b (meere)

K2-18b
	Exoplanet K2-18 b (Illustration).jpg Muuqaalka k2-18b
Calaamadayn
Magac isbedela	EPIC 201912552 b,

k2-18b (Af Ingiriis : K2-18B exoplanet) waa meere ee la helay saynis ahaan meeri cusub oo si aad ah uga duwan dhammaan kuwii hore loo arkay, waxaana loo bixiyay magaca K2-18b. Meerahan wuxuu ku yaal meel fog oo ka tirsan cirka, qiyaastii 140 sano-iftiin ka fog dhulka, wuxuuna ku wareegaa xiddig iftiin yar leh oo loo yaqaano K2-18. Waxa ugu yaabka badan ee meerahan ka dhigaya mid gaar ah waa iftiinka uu leeyahay habeenkii — dhulka meerahan wuxuu iftiimaa midab guduudan oo jilicsan. Cilmi-baarayaashu waxay aaminsan yihiin in macdanaha gaar ah ee ku jira oogada meeraha ay nuugaan iftiinka maalintii, ka dibna si tartiib ah u sii daayaan habeenkii, taasoo keenta muuqaal cajiib ah oo dhalaalaya. Cirka meeraha sidoo kale waxa ku jira daruuro ka samaysan boor la mid ah dhagaxyaalaha yaryar ee dhalaalaya, taasoo ka dhigaysa cirka inuu u ekaado bandhig iftiin ah. Waxa kale oo cirka sare ku qulqulaya baraf waaweyn oo sabeynaya, kuwaas oo sababo la xiriira cuf-is-jiidadka hoose iyo cadaadiska hawada ay hawada ku dul sabbaynayaan si deggan.

Waxaa sii xiiso badan waxa dhici kara gudaha meeraha K2-18b. In kasta oo dusha sare aad u qabowdahay, gudaha meeraha waxaa lagu ogaaday inuu kulul yahay oo firfircoon, iyadoo calaamado muujinaya foolkaanayaal dhulka hoostiisa ka jira la helay. Waxaa suurtogal ah in biyaha dareeraha ahi ay hoosta dhulka ka jiraan, taasoo fure u noqon karta suurta-galnimada nolosha. Waxa intaas dheer, waxaa hawada meeraha laga helay calaamado kiimiko ah oo si joogto ah isugu celceliya — taasoo muujin karta in laga yaabo in nooleyaal ku dhuumaaleysanayaan gudaha. In kasta oo aan weli la xaqiijin karin, haddana xogtan cusub waxay abuurtay dareen weyn oo xiise leh oo ka dhex jira bulshada cilmi-baarista. K2-18b waa wax ka badan dhagax barafaysan oo hawada ku dul wareegaya — waa meeri dhalaalaya, sir badan xambaarsan, oo laga yaabo inuu haysto nolol qarsoon oo weli aan la helin.^[1]

Qoraalol la mid ah

Portal:Dhul

Tixraac

↑ Reed, Nathan W.; Shearer, Randall L.; McGlynn, Shawn Erin; Wing, Boswell A.; Tolbert, Margaret A.; Browne, Eleanor C. (October 2024). "Abiotic Production of Dimethyl Sulfide, Carbonyl Sulfide, and Other Organosulfur Gases via Photochemistry: Implications for Biosignatures and Metabolic Potential". The Astrophysical Journal. 973 (2): L38. Bibcode:2024ApJ...973L..38R. doi:10.3847/2041-8213/ad74da. ISSN 0004-637X.

[1] Reed, Nathan W.; Shearer, Randall L.; McGlynn, Shawn Erin; Wing, Boswell A.; Tolbert, Margaret A.; Browne, Eleanor C. (October 2024). "Abiotic Production of Dimethyl Sulfide, Carbonyl Sulfide, and Other Organosulfur Gases via Photochemistry: Implications for Biosignatures and Metabolic Potential". The Astrophysical Journal. 973 (2): L38. Bibcode:2024ApJ...973L..38R. doi:10.3847/2041-8213/ad74da. ISSN 0004-637X.

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