Sayari-nje : Tofauti kati ya masahihisho
Content deleted Content added
No edit summary |
nadharia za awali |
||
Mstari 1:
[[File:Exoplanet Discovery Methods Bar.png|thumb|300px|Idadi ya Sayari za Nje, kufuatana na mwaka wa kugunduliwa hadi Septemba 2014.]]
'''Sayari ya nje''' ([[ing.]] [[:en:exoplanet|exoplanet]], au extrasolar planet) ni [[sayari]]
Mnamo mwaka 2017 zaidi ya sayari za nje 3000 zinazozunguka [[nyota]] mbalimbali zilitambuliwa tayari. <ref>{{cite web|url=http://exoplanetarchive.ipac.caltech.edu/cgi-bin/ExoTables/nph-exotbls?dataset=planets|title=Exoplanet Archive Planet Counts|publisher=}}</ref><ref name="kepler1700">{{cite web |last1=Johnson |first1=Michele |last2=Harrington |first2=J.D. |title=NASA's Kepler Mission Announces a Planet Bonanza, 715 New Worlds |url=http://www.nasa.gov/ames/kepler/nasas-kepler-mission-announces-a-planet-bonanza/ |date=February 26, 2014 |work=[[NASA]] |accessdate=February 26, 2014 }}</ref><ref>{{cite web|url=http://phl.upr.edu/projects/habitable-exoplanets-catalog|title=The Habitable Exoplanets Catalog - Planetary Habitability Laboratory @ UPR Arecibo|publisher=}}</ref>
Kwa muda mrefu sayari nje ya mfumo wa Jua letu hazikujulikana. [[Giordano Bruno]] aliwaza mnamo karne ya 16 ya kwamba kuna dunia nyingi katika anga sawa na Dunia yetu.<ref>Eli Maor (2013), uk 198</ref> [[Isaac Newton]] alifikiri pia ya kwamba sayari zinaweza kuwepo nje ya mfumo wetu. Lakini haikuwezakana kuthebitisha nadharia hizi.
Hadi [[miaka ya 1990]] [[idadi]] kubwa ya [[wanaastronomia]] bado walihangaika kama sayari za nje ziko au la. Mwaka [[1992]] watafiti [[Aleksander Wolszczan]] na [[Dale Frail]] waliofanya [[kazi]] ya [[astronomia ya redio]] walitangaza kugunduliwa kwa sayari [[mbili]] zinazozunguka [[nyota tutusi]] (''pulsar'') [[PSR 1257+12]].<ref name="Wolszczan">{{Cite journal | last1 = Wolszczan | first1 = A. |bibcode=1992Natur.355..145W| last2 = Frail | first2 = D. A. | doi = 10.1038/355145a0 | title = A planetary system around the millisecond pulsar PSR1257 + 12 | journal = Nature | volume = 355 | issue = 6356 | pages = 145–147 | year = 1992 | pmid = | pmc = }}</ref> Miaka michache baadaye taarifa hii ilithibitishwa na wagunduzi wengine.
Line 24 ⟶ 26:
* [http://media4.obspm.fr/exoplanets/ Exoplanets] at Paris Observatory
* [http://exographs.net/ Graphical Comparison of Extrasolar Planets]
==Marejeo==
* Eli Maor (1987). "Chapter 24: The New Cosmology". To Infinity and Beyond: A Cultural History of the Infinite. Springer 2013 [https://books.google.de/books?id=v0btBwAAQBAJ&pg=PA198&dq=infinity+of+worlds+of+the+same+kind+as+our+own&redir_esc=y&hl=de#v=onepage&q=infinity%20of%20worlds%20of%20the%20same%20kind%20as%20our%20own&f=false kupitia google books hapa]
[[Category:Sayari]]
| |||