File:The violent youth of solar proxies.jpg
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Summary
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English: Stars similar to our Sun — “solar proxies” — enable scientists to look through a window in time to see the harsh conditions prevailing in the early or future Solar System, as well as in planetary systems around other stars. These studies could lead to profound insights into the origin of life on Earth and reveal how likely (or unlikely) the rise of life is elsewhere in the cosmos. This work has revealed that the Sun rotated more than ten times faster in its youth (over four billion years ago) than today generating a stronger magnetic field and stronger activity. This also meant that the young Sun emitted X-rays and ultraviolet radiation up to several hundred times stronger than the Sun does today.
Français : Les étoiles similaires à notre Soleil permettent aux scientifiques d'observer les conditions qui prévalent à la naissance d'un système planétaire et son évolution dans le futur. De là, on peut avoir une idée du passé de notre système solaire et de son avenir. |
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| Author | IAU/E. Guinan | ||
| Permission (Reusing this file) |
http://www.iau.org/copyright/ |
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This image was selected as picture of the day on Wikimedia Commons for 4 April 2014. It was captioned as follows: English: Stars similar to our Sun — “solar proxies” — enable scientists to look through a window in time to see the harsh conditions prevailing in the early or future Solar System, as well as in planetary systems around other stars. Other languages:
Bosanski: Zvijezde slične našem Suncu - sunčeve komšije - omogućavaju naučnicima da pogledaju kroz prozor u vremenu i vide oštre uslove koji su vladali u prošlosti ili će vladati u budućnosti u Sunčevom sistemu, kao i planetarne sisteme oko drugih zvijezda. Čeština: Hvězdy podobné našemu Slunci umožňují vědcům pozorovat oknem času podmínky převádající v minulosti nebo v předpokládané budoucnosti Solárního systému stejně jako planetární systémy okolo ostatních hvězd. English: Stars similar to our Sun — “solar proxies” — enable scientists to look through a window in time to see the harsh conditions prevailing in the early or future Solar System, as well as in planetary systems around other stars. Italiano: L'osservazione di stelle simili al nostro Sole permette agli scienziati di osservare quali sono state le sue condizioni nel passato o quali saranno nel futuro. Magyar: A Naphoz hasonló csillagok segítik a tudósokat az idő ablakán keresztül megfigyelni a múlt és jövőbeli Naprendszerben, valamint más csillagok körüli bolygórendszerekben uralkodó mostoha körülményeket Nederlands: Sterren die vergelijkbaar zijn met onze Zon maken het voor wetenschappers mogelijk om door de tijd te reizen en eerdere condities van onze Zon te bestuderen. 中文： 类似太阳的行星——太阳模拟，科学家通过其早期和未来的太阳系统，以及周围的行星系统。 |
Licensing
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This media was created by the International Astronomical Union (IAU).
Their website states: "The images, videos and web texts on iau.org are released under the Creative Commons Attribution 4.0 International License and may on a non-exclusive basis be reproduced without fee, on the conditions outlined below." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. Conditions:
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  This file is licensed under the Creative Commons Attribution 4.0 International license.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 22:29, 15 December 2013 | | 4,000 × 1,951 (2.65 MB) | wikimediacommons>Stas1995 | User created page with UploadWizard |
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