Transcript for scene 19 of the video " The Incredible Experience vs Ice Age - part 2" by Rolf Witzsche  

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Of the active stars, the star Sirius

In the sequence of comparison of progressively larger stars, shown here, only two intensely active stars appear after the Sun, with the remaining types standing as examples of what one might term, inactive stars. Of the active stars, the star Sirius in panel 3, stands as an example for a range of active stars that are larger than the Sun and have a higher surface temperature. The Sun has a surface temperature of 5,800 degrees Kelvin. The larger stars exceed this.

 

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Published by Cygni Communications Ltd. North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F. Witzsche