by Ann » Thu Oct 02, 2014 3:22 pm
rstevenson wrote:Ann wrote:Unless I'm very much mistaken, the O star that powers the Bubble Nebula can be seen above and to the left of the bubble center in this image.
geckzilla wrote:I think you're right. In fact, I think the APOD description has been wrong more than once, now.
I don't see how you can tell, from just this picture. Wouldn't you need more data, gathered in other ways?
Rob
I'm obviously not able to just look at a picture (whether RGB, narrowband or black and white) of a random, nebula-free part of the sky and just tell from visual inspection if there is an O-type star in there.
No, but several years ago I made it my business to familiarize myself at least to some degree with all the more prominent O-type stars in the sky. Can't say I really succeeded, certainly not in, say, the Carina nebula where there is a bewildering number of hot stars.
No, but I do recognize other O-type stars, for example SAO 20575, the O-type star blowing the Bubble Nebula. I recognize the nebula, and I know the (apparent) position and relative brightness of SAO 20575 inside it.
Ann
[quote="rstevenson"][quote="Ann"]Unless I'm very much mistaken, the O star that powers the Bubble Nebula can be seen [i]above[/i] and to the left of the bubble center in this image.[/quote]
[quote="geckzilla"]I think you're right. In fact, I think the APOD description has been wrong more than once, now.[/quote]
I don't see how you can tell, from just this picture. Wouldn't you need more data, gathered in other ways?
Rob[/quote]
I'm obviously not able to just look at a picture (whether RGB, narrowband or black and white) of a random, nebula-free part of the sky and just tell from visual inspection if there is an O-type star in there.
No, but several years ago I made it my business to familiarize myself at least to some degree with all the more prominent O-type stars in the sky. Can't say I really succeeded, certainly not in, say, the Carina nebula where there is a bewildering number of hot stars.
No, but I do recognize other O-type stars, for example SAO 20575, the O-type star blowing the Bubble Nebula. I recognize the nebula, and I know the (apparent) position and relative brightness of SAO 20575 inside it.
Ann