by johnnydeep » Mon Jul 31, 2023 1:22 pm
VictorBorun wrote: ↑Mon Jul 31, 2023 1:24 am
johnnydeep wrote: ↑Sun Jul 30, 2023 8:37 pm
VictorBorun wrote: ↑Sun Jul 30, 2023 8:03 pm
the black background is the Coal Sack, right[float]Herbig-Haro 46+47 (NIRCam Compass Image) 20.jpg[/float]
Herbig-Haro 46+47 (NIRCam Compass Image) 1600.jpg
Wait - so all those background galaxies and stars are actually shining THROUGH the Coal Sack Nebula (in near infrared via NIRcam)?
my bad, sorry
1) Herbig-Haro 46+47 is not in
the Coal Sack; here is just its alike, a nameless Bok globule
2) the question mark shaped distant galaxy is not behind the globule; it's aside of it
HH 46 47.jpgHH 46 47-.jpg
No problem. I myself was doubly confused, both in thinking that the dark cloud shown here
WAS the Coal Sack (thanks to Ann's mention of it, and me overlooking the "-like" qualifier), and also which side of the dusty divide the dark cloud was on (hint: the cloud is brighter in IR than in visible light!). And so, of course, to answer my own question, there really
are stars and galaxies shining through the dark - not Coal Sack! - cloud, in the near IR!
[quote=VictorBorun post_id=332614 time=1690766690 user_id=145500]
[quote=johnnydeep post_id=332610 time=1690749425 user_id=132061]
[quote=VictorBorun post_id=332607 time=1690747415 user_id=145500]
the black background is the Coal Sack, right[float]Herbig-Haro 46+47 (NIRCam Compass Image) 20.jpg[/float]
Herbig-Haro 46+47 (NIRCam Compass Image) 1600.jpg
[/quote]
Wait - so all those background galaxies and stars are actually shining THROUGH the Coal Sack Nebula (in near infrared via NIRcam)?
[/quote]
my bad, sorry
1) Herbig-Haro 46+47 is not in [i]the[/i] Coal Sack; here is just its alike, a nameless Bok globule
2) the question mark shaped distant galaxy is not behind the globule; it's aside of it
[imghover=https://asterisk.apod.com/download/file.php?id=47997&t=1]https://asterisk.apod.com/download/file.php?id=47998&t=1[/imghover]
HH 46 47.jpgHH 46 47-.jpg
[/quote]
No problem. I myself was doubly confused, both in thinking that the dark cloud shown here [b][i]WAS [/i][/b]the Coal Sack (thanks to Ann's mention of it, and me overlooking the "-like" qualifier), and also which side of the dusty divide the dark cloud was on (hint: the cloud is brighter in IR than in visible light!). And so, of course, to answer my own question, there really [i][b]are [/b][/i]stars and galaxies shining through the dark - not Coal Sack! - cloud, in the near IR!