I always want to put things in perspective.
Why is that globule cometary? What made it open its mouth? Nearby hot bright stars, sure. What stars?
I found the coordinates for CG4, which is the name of this thing, and saw that it is located relatively close to Gamma Velorum, an enormous powerhouse in constellation Vela, the Sail. So I googled CG4 + Gamma Velorum and found... nothing.
This is the best I can do to show you where CG4 is in relation to Gamma Velorum:
To show you why it is important to put cometary globules into perspective, consider another such globule, the Dark Tower in Scorpius:
So, yeah. Perspective is important. Gerald Rehmann showed us why the Dark Tower in Scorpius and the massive open cluster NGC 6231 belong together. Now we really need a picture that shows us Gamma Velorum and CG4 in the same frame.
Oh, and... why has CG4 ruptured? How about Gamma Velorum released a jet of energy some time in the past, and CG4 took a direct hit? Perhaps the Wolf-Rayet component of Gamma Velorum had an outburst? It's a mean thing, Gamma Velorum.
And that galaxy that CG4 appears to be eating? Oh, it's PGC 21338, also known as ESO 257-19. It may have an active galactic nucleus, said Simbad. What's the distance to that thing? I don't know!
Ann
Why is that globule cometary? What made it open its mouth? Nearby hot bright stars, sure. What stars?
I found the coordinates for CG4, which is the name of this thing, and saw that it is located relatively close to Gamma Velorum, an enormous powerhouse in constellation Vela, the Sail. So I googled CG4 + Gamma Velorum and found... nothing.
This is the best I can do to show you where CG4 is in relation to Gamma Velorum:
This way to CG4.
To show you why it is important to put cometary globules into perspective, consider another such globule, the Dark Tower in Scorpius:
The Dark Tower in Scorpius and star cluster NGC 6231.
Credit: Gerald Rehmann.
Credit: Gerald Rehmann.
So, yeah. Perspective is important. Gerald Rehmann showed us why the Dark Tower in Scorpius and the massive open cluster NGC 6231 belong together. Now we really need a picture that shows us Gamma Velorum and CG4 in the same frame.
Oh, and... why has CG4 ruptured? How about Gamma Velorum released a jet of energy some time in the past, and CG4 took a direct hit? Perhaps the Wolf-Rayet component of Gamma Velorum had an outburst? It's a mean thing, Gamma Velorum.
And that galaxy that CG4 appears to be eating? Oh, it's PGC 21338, also known as ESO 257-19. It may have an active galactic nucleus, said Simbad. What's the distance to that thing? I don't know!
Ann
Statistics: Posted by Ann — Tue May 21, 2024 4:49 am — Replies 1 — Views 37