Our Sun Is A Star ! |
Our Sun Is A Star ! |
Guest_PhilCo126_* |
Feb 21 2006, 03:51 PM
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#1
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Guests |
A very simple topic title because everybody knows that our Sun is a Star ( lectured to 8 year olds all over the world ... )
But which scientist/Astronomer actually found out this 'simple' fact ? ( 17th Century CHristiaan HUYGENS studied the Sun, 19th Century Angelo SECHI even studied Sunspots ) I do know that 20th Century Fred HOYLE did a lot of calculations on the destiny of Stars but we might go back way earlier to know who found out that our Sun is a Star |
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Guest_Richard Trigaux_* |
Feb 21 2006, 05:52 PM
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#2
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Guests |
For us it is easy, but back in the past, it was not obvious, as the Sun and stars look very different. Only when thinkers became aware of the huge distances of the stars it was possible to infer their enormous luminosity. Well though at that time.
It would be even more impressive if some antic thinker had such an idea, but I never heard of that. Another difficulty is that, until recently, everybody was thinking at stars as being fixed on a sphere, all at the same distance, thus explaining that they don't have a parralax even if they were not much further than the planets. So the idea that stars were not all at the same distance and not all the same size had to be discovered before. Anyway the fist physical evidence was only very recent, the end of the 19th century, with the discovery of spectroscopy, which allowed to really see that the sun has the same composition and temperatures than stars. And nailing down whose scientist I don't remember his name, who stated just a year before that "we shall never know what are the stars"... |
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