07-16-2015, 12:43 AM
Nojoomfa نوشته: با تشکر از راهنمایی شما دوستان عزیز سوال که من دارم درباره فاصله نوری ستاره سهیل تا سیاره ماست
که در سایت انگلیسی ویکی پدیا این متن امده که میخواستم دوستان که به زبان انگلیسی واردن این را ترجمه کنند و معنیش را برام واضح کنند
متن انگلیسی
Properties
Before the launch of the Hipparcos satellite telescope, distance estimates for the star varied widely, from 96 light years to 1200 light years. Had the latter distance been correct, Canopus would have been one of the most luminous stars in our galaxy. Hipparcos established Canopus as lying 310 light years (96 parsecs) from our solar system; this is based on its 2007 parallax measurement of 10.43 ± 0.53 mas.[1] The difficulty in measuring Canopus' distance stemmed from its unusual nature. Canopus has been classified as a F0 II or F0 Ib (Ib referring to "less luminous supergiant") star,[3] and such stars are rare and poorly understood; they are stars that can be either in the process of evolving to or away from red giant status.[35] This in turn made it difficult to know how intrinsically bright Canopus is, and therefore how far away it might be. Direct measurement was the only way to solve the problem. Canopus is too far away for Earth-based parallax observations to be made, so the star's distance was not known with certainty until the early 1990s.
آدرس متن
https://en.wikipedia.org/wiki/Canopus
ممنون میشوم راهنمایی کنید چون من جایی خوندم فاصله نوری ستاره سهیل تا زمین 75 سال هست ولی در ویکیپدیای فارسی خوندم 313 سال هست که میخواستم راهنمایی کنید
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