Quote:
Originally Posted by skwinty
Here's some pix showing the different planets and stars together  |
Couple of things wrong with those stars size comparisons. The Sun is quite a bit larger in relation to Sirius than what you see there. That white ball is 3 or so times larger than the orange ball that's the Sun. Sirius' actual diameter is 1.8 times the Sun's. The Earth/Mars comparison would be a closer fit in relation to the two stars (Mars is 53% of the Earth's diameter...actually a little smaller than Sirius/Sun = 55%). Now, if you said it was Vega, I'd say "yes". And, Rigel is a lot bigger than Aldebaran (70 v 40 solar radii). Pollux and Arcturus should be larger (10 and 30 solar radii, respectively) than shown, if you keep Sirius that size....(reduce it to proper size and they're both right). I'd also question the Betelgeuse/Antares comparison....although their actual sizes are uncertain anyway, given the nature of the two stars. I'll do a couple of quick calc's and get back on those two
