posted on Jun, 12 2007 @ 02:41 AM
Wow, that video rocks! (added it to favourites in my youtube account :p) I saw a couple images posted by another member somewhere in the space
exploration forum, that were very similar, only they stopped with Antares, I believe, while that video had two even more massive stars.
As to figuring out the diameter of a star, as long as you know roughly how far away it is, and can see it, and thus know how bright it is, it should
be possible to figure out how big the star is. Unfortunately, knowing how far away it is isn't always possible, and it can sometimes be very hard to
tell the difference between a small, dim star that is very close and an uber-massive star that is very far away.
Always keep in mind also that most scientific measurements are usually good to perhaps a few percent, depending on the type of measurement. I
wouldn't be surprised if the margin of error for a star diameter was 5 or even 10 percent. Still, I trust that most star diameters that you can find
in an astronomical text are close enough to the actual thing that they can be considered reliable.