Starship Asterisk*

[quote=Ann post_id=332377 time=1689660189 user_id=129702]
Different pictures of the same deep-sky objects may look very different when you photograph them with different equipment and filters and exposure times and what not!
[/quote]

Makes sense to me to switch back and forth to [url=https://coolcosmos.ipac.caltech.edu/images/142]IR version[/url] to see clearly where exactly the spherical core is:
[attachment=0]Milky Way IR allsky-2mass-.jpg[/attachment]
1.2 microns to blue, 1.6 microns to green, and 2.2 microns to red

Somehow what is left of the dust in near IR is still brown.
Like the dust clouds are dark against the backlight from the stellar population of the galactic disk and the core and the spectrum of the dust is monotonically brighter at longer wavelenghths no matter whether we look in the optical or near infrared range

[attachment=0]MwLaPalma_Rosadzinski_960_annotated.jpg[/attachment]
very nice! 8-)

As of three days ago, they have been evacuated because of the wildfires. Here's hoping the fire brigade gets the fires under control.

https://www.canarianweekly.com/posts/The-observatory-in-La-Palma-is-evacuated-due-to-the-proximity-of-the-fire

[quote]To help find out, telescopes all over the globe [i][b]will [/b][/i]be pointing into deep space. Investigations [i][b]will[/b][/i] include[/quote]

I don't understand the use of future tense here. The composite is over and done with! Just an odd use of grammar IMO.

This APOD is nice in many ways. I like the inclusion of the telescopes, particularly the one that is under construction at far right. The Milky Way sky certainly looks impressive, and i applaud the annotations.

However, some famous deep sky objects hardly show up in the APOD, while a few nebulas that are really faint show up prominently!


[float=left][img3="Milky Way above La Palma Observatory. Image Credit & Copyright: Marcin Rosadziński"]https://apod.nasa.gov/apod/image/2307/MwLaPalma_Rosadzinski_960_annotated.jpg[/img3][/float][float=right][attachment=0]APOD 18 July 2023 details annotated.png[/attachment][c][size=85][color=#0040FF]Missing objects and names for prominent-looking nebulas[/color][/size][/c][/float]
[clear][/clear]


For comparison, let's look at Akira Fuji's portrait of the Teapot region in Sagittarius.


[img3="Constellation Sagittarius. Credit: NASA/ESA/Akira Fuji"]https://cdn.spacetelescope.org/archives/images/screen/heic0107e.jpg[/img3]


Akira Fuji used no hydrogen alpha filter for his image, and lo and behold, only three objects in his picture look pink: Large bright Lagoon Nebula, tiny Trifid Nebula and M17, at the very top of the image. Note star cluster M7 in the lower right corner.

Different pictures of the same deep-sky objects may look very different when you photograph them with different equipment and filters and exposure times and what not!

Ann

[url=https://apod.nasa.gov/apod/ap230718.html] [img]https://apod.nasa.gov/apod/calendar/S_230718.jpg[/img] [size=150]Milky Way above La Palma Observatory[/size][/url]

[b] Explanation: [/b] What's happening in the night sky? To help find out, telescopes all over the globe will be [url=https://apod.nasa.gov/apod/ap170221.html]pointing[/url] into deep space. [url=https://upload.wikimedia.org/wikipedia/commons/4/49/Cat_investigates_washing_machine_2003-07-03.png]Investigations[/url] will include trying to understand the [url=https://apod.nasa.gov/apod/ap230715.html]early universe[/url], finding and tracking [url=https://cneos.jpl.nasa.gov/about/neo_groups.html]Earth-menacing asteroids[/url], searching for [url=https://exoplanets.nasa.gov/]planets that might contain extra-terrestrial life[/url], and [url=https://apod.nasa.gov/apod/ap200217.html]monitoring stars[/url] to help better understand our Sun. The [url=https://www.instagram.com/p/Cs_zV9fIztu/]featured composite[/url] includes foreground and background images taken in April from a mountaintop on [url=https://youtu.be/Ub9622tvuUM]La Palma[/url] island in the [url=https://en.wikipedia.org/wiki/Canary_Islands]Canary Islands[/url] of [url=https://en.wikipedia.org/wiki/Spain]Spain[/url]. Pictured, several telescopes from the [url=https://youtu.be/ADH89JORFY4]Roque de los Muchachos Observatory[/url] are shown in front of a dark night sky. Telescopes in the foreground include, left to right, [url=https://en.wikipedia.org/wiki/MAGIC_(telescope)]Magic[/url] 1, [url=https://en.wikipedia.org/wiki/Galileo_National_Telescope]Galileo[/url], [url=https://apod.nasa.gov/apod/ap200724.html]Magic[/url] 2, [url=http://www.gtc.iac.es/gtc/gtc.php]Gran Canarian[/url], and [url=https://www.lst1.iac.es/]LST[/url]. Sky highlights in the background include the [url=https://apod.nasa.gov/apod/ap230620.html]central band[/url] of our [url=https://solarsystem.nasa.gov/resources/285/the-milky-way-galaxy/]Milky Way Galaxy[/url], the constellations of [url=https://chandra.harvard.edu/photo/constellations/sagittarius.html]Sagittarius[/url], [url=https://en.wikipedia.org/wiki/Ophiuchus]Ophiuchus[/url] and [url=https://apod.nasa.gov/apod/ap210616.html]Scorpius[/url], the red-glowing [url=https://apod.nasa.gov/apod/ap220812.html]Eagle[/url] and [url=https://www.nasa.gov/feature/goddard/2017/messier-8-the-lagoon-nebula]Lagoon Nebulas[/url], and the stars [url=https://en.wikipedia.org/wiki/Alpha_Sagittarii]Alrami[/url] and [url=https://apod.nasa.gov/apod/ap220126.html]Antares[/url]. Due to [url=https://en.wikipedia.org/wiki/Observatory]observatories[/url] like this, [url=https://apod.nasa.gov/apod/ap190818.html]humanity[/url] has understood more about our [url=https://solarsystem.nasa.gov/skywatching/home/]night sky[/url] in the past 100 years than ever before in all of [url=https://en.wikipedia.org/wiki/Human_history#/media/File:World-population-1750-2015-and-un-projection-until-2100.png]human history[/url].


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