Deep Sky Detail (Mark)
@deepskydetail.bsky.social
Plays an amateur astronomer on YouTube.
Has fun with astronomy in real life.
Trained in cognitive science.
Also likes other things!
https://www.youtube.com/@deepskydetail
Has fun with astronomy in real life.
Trained in cognitive science.
Also likes other things!
https://www.youtube.com/@deepskydetail
How did we miss the OIII arc next to Andromeda for so long? I try to answer this in my newest #astrophotography video, presenting three possible answers.
youtu.be/DKMS_uD1dQU
youtu.be/DKMS_uD1dQU
Because of Noise Reduction? Are we processing out the good stuff?
YouTube video by Deep Sky Detail
youtu.be
November 15, 2025 at 2:31 AM
How did we miss the OIII arc next to Andromeda for so long? I try to answer this in my newest #astrophotography video, presenting three possible answers.
youtu.be/DKMS_uD1dQU
youtu.be/DKMS_uD1dQU
This video is coming out tomorrow :)
Why can't we see gorillas? Or rather, giant nebulae?
I'm starting to analyze some narrowband data from different filters (5nm SVBONY SHO filters, 3nm Dual Narrowband SVBONY and Optolong 12nm SHO filters). But... before I do that...
I'm starting to analyze some narrowband data from different filters (5nm SVBONY SHO filters, 3nm Dual Narrowband SVBONY and Optolong 12nm SHO filters). But... before I do that...
November 14, 2025 at 4:18 AM
This video is coming out tomorrow :)
Why can't we see gorillas? Or rather, giant nebulae?
I'm starting to analyze some narrowband data from different filters (5nm SVBONY SHO filters, 3nm Dual Narrowband SVBONY and Optolong 12nm SHO filters). But... before I do that...
I'm starting to analyze some narrowband data from different filters (5nm SVBONY SHO filters, 3nm Dual Narrowband SVBONY and Optolong 12nm SHO filters). But... before I do that...
November 14, 2025 at 4:17 AM
Why can't we see gorillas? Or rather, giant nebulae?
I'm starting to analyze some narrowband data from different filters (5nm SVBONY SHO filters, 3nm Dual Narrowband SVBONY and Optolong 12nm SHO filters). But... before I do that...
I'm starting to analyze some narrowband data from different filters (5nm SVBONY SHO filters, 3nm Dual Narrowband SVBONY and Optolong 12nm SHO filters). But... before I do that...
What a cool project from @astroaf.space !! A DIY harmonic drive mount for #astrophotography
www.youtube.com/watch?v=-n8U...
www.youtube.com/watch?v=-n8U...
Design and Build a DIY Harmonic Drive Telescope Mount!
YouTube video by AstroAF
www.youtube.com
November 12, 2025 at 2:05 AM
What a cool project from @astroaf.space !! A DIY harmonic drive mount for #astrophotography
www.youtube.com/watch?v=-n8U...
www.youtube.com/watch?v=-n8U...
Reposted by Deep Sky Detail (Mark)
The Crescent Nebula taken over 5 minutes in June and July. This time, I caught a hint of the Soap Bubble! The starless version shows it more clearly. Higher res version on astrobin: app.astrobin.com/i/ni99aj
#astronomy #astrophotography #space #Nebula
#astronomy #astrophotography #space #Nebula
November 7, 2025 at 8:26 PM
The Crescent Nebula taken over 5 minutes in June and July. This time, I caught a hint of the Soap Bubble! The starless version shows it more clearly. Higher res version on astrobin: app.astrobin.com/i/ni99aj
#astronomy #astrophotography #space #Nebula
#astronomy #astrophotography #space #Nebula
November 7, 2025 at 2:36 AM
I just posted a video with 130 #astrophotography terms that will probably be really helpful for anyone starting out. I analyzed 2 million words from online forums, found the most common terms, and explain them. I may have missed a few, but there is a lot here.
youtu.be/Gt5PZwyxIys
youtu.be/Gt5PZwyxIys
November 4, 2025 at 12:57 AM
I just posted a video with 130 #astrophotography terms that will probably be really helpful for anyone starting out. I analyzed 2 million words from online forums, found the most common terms, and explain them. I may have missed a few, but there is a lot here.
youtu.be/Gt5PZwyxIys
youtu.be/Gt5PZwyxIys
Know someone new to astrophotography? For the past few months, I've tried creating a list of the most used astro terms that beginners need. I analyzed over 2 MILLION words from beginner forums, figured out the most common 130+ terms and made a video. It will be released in less than 24 hours.
November 3, 2025 at 5:52 AM
Know someone new to astrophotography? For the past few months, I've tried creating a list of the most used astro terms that beginners need. I analyzed over 2 MILLION words from beginner forums, figured out the most common 130+ terms and made a video. It will be released in less than 24 hours.
November 1, 2025 at 12:48 AM
I've been testing out some new 5nm SHO filters (fully funded by me and my YT and BMC supporters; not sent to me) on several targets. This is a test of the heart nebula (IC 1805). It's about 1.5 hours for each filter (so, about 4.5 hours total).
#astrophotography. @kat-astro-bot.bsky.social
#astrophotography. @kat-astro-bot.bsky.social
October 26, 2025 at 5:13 PM
I've been testing out some new 5nm SHO filters (fully funded by me and my YT and BMC supporters; not sent to me) on several targets. This is a test of the heart nebula (IC 1805). It's about 1.5 hours for each filter (so, about 4.5 hours total).
#astrophotography. @kat-astro-bot.bsky.social
#astrophotography. @kat-astro-bot.bsky.social
There are a ton of galaxies in this image. In the middle are NGC 6045 and 6047. If you zoom in and look, there are edge on galaxies, interacting galaxies, merging galaxies. It's a galaxy extravaganza!
#astrophotography
#astrophotography
October 20, 2025 at 2:22 AM
There are a ton of galaxies in this image. In the middle are NGC 6045 and 6047. If you zoom in and look, there are edge on galaxies, interacting galaxies, merging galaxies. It's a galaxy extravaganza!
#astrophotography
#astrophotography
Reposted by Deep Sky Detail (Mark)
Precise measurements of stars’ motions show that a wave is propagating outward from our galaxy’s center — perhaps from a long-ago collision with another galaxy.
skyandtelescope.org/astronomy-ne...
.
.
#astronomy #galaxy #milkyway #cosmology
skyandtelescope.org/astronomy-ne...
.
.
#astronomy #galaxy #milkyway #cosmology
A “Great Wave” Is Crashing through the Milky Way
Precise measurements of stars’ motions show that a wave is propagating outward from our galaxy’s center — perhaps from a long-ago collision with another galaxy.
skyandtelescope.org
October 17, 2025 at 1:46 PM
Precise measurements of stars’ motions show that a wave is propagating outward from our galaxy’s center — perhaps from a long-ago collision with another galaxy.
skyandtelescope.org/astronomy-ne...
.
.
#astronomy #galaxy #milkyway #cosmology
skyandtelescope.org/astronomy-ne...
.
.
#astronomy #galaxy #milkyway #cosmology
NGC 6384 is such a beautiful galaxy, and a great example of an intermediate barred spiral. I got around 14 hours of integration time at f/10 with my Celestron C8. It's still too noisy at the edges, and definitely needs more time.
#Astrophotography
#Astrophotography
October 17, 2025 at 2:43 AM
NGC 6384 is such a beautiful galaxy, and a great example of an intermediate barred spiral. I got around 14 hours of integration time at f/10 with my Celestron C8. It's still too noisy at the edges, and definitely needs more time.
#Astrophotography
#Astrophotography
I made a video on how you can get started in #Astrophotography with just a smartphone and tripod. Below is the link :)
youtu.be/1g7CTZIbs6U
youtu.be/1g7CTZIbs6U
CAPTURE the MILKY WAY with YOUR SMARTPHONE. Ep. 1 (Astro Guide)
YouTube video by Deep Sky Detail
youtu.be
October 13, 2025 at 4:54 PM
I made a video on how you can get started in #Astrophotography with just a smartphone and tripod. Below is the link :)
youtu.be/1g7CTZIbs6U
youtu.be/1g7CTZIbs6U
Reposted by Deep Sky Detail (Mark)
Reposted by Deep Sky Detail (Mark)
Coming soon, a script to reveal all details of your images.
October 1, 2025 at 10:52 AM
Coming soon, a script to reveal all details of your images.
I've been experimenting with my S24 to capture the milky way. I'm skeptical of Samsung's ability to take a picture of it using its camera app. I'm just not sure how much of it is AI enhancement. So, I used a separate app with all the AI features turned off to take raw images. I stacked them in Siril
September 20, 2025 at 9:58 PM
I've been experimenting with my S24 to capture the milky way. I'm skeptical of Samsung's ability to take a picture of it using its camera app. I'm just not sure how much of it is AI enhancement. So, I used a separate app with all the AI features turned off to take raw images. I stacked them in Siril
A 1 hour time lapse of the Milky Way taken with my S24 phone (raw images using the ProShot App) in Bortle 5 skies. A motion sensing flood light kept turning on, unfortunately. I think bugs were flying in front of the sensor. Processed in @siril.org with flats and darks #astrophotography #milkyway
September 20, 2025 at 3:18 AM
A 1 hour time lapse of the Milky Way taken with my S24 phone (raw images using the ProShot App) in Bortle 5 skies. A motion sensing flood light kept turning on, unfortunately. I think bugs were flying in front of the sensor. Processed in @siril.org with flats and darks #astrophotography #milkyway
Every now and then, I see discussions about colors in astro photos. Are they real? A video I made on this a couple years ago has a surprising answer: all color everywhere is fake! It's the second video in a series. There's cognitive science to back it up! :)
youtu.be/VIhngr6nxk4?...
youtu.be/VIhngr6nxk4?...
Why No One Agrees on Color in Astrophotography. Is Astrophotography Real Part 2: Context and Color
YouTube video by Deep Sky Detail
youtu.be
September 10, 2025 at 1:07 AM
Every now and then, I see discussions about colors in astro photos. Are they real? A video I made on this a couple years ago has a surprising answer: all color everywhere is fake! It's the second video in a series. There's cognitive science to back it up! :)
youtu.be/VIhngr6nxk4?...
youtu.be/VIhngr6nxk4?...
Reposted by Deep Sky Detail (Mark)
I dunno, I just want right and wrong to matter again.
September 9, 2025 at 1:11 PM
I dunno, I just want right and wrong to matter again.
Reposted by Deep Sky Detail (Mark)
Dark Shark Nebula taken with the Askar 91F. Only 82 mins of integration time from a Bortle 3 location.
Video about the telescope: www.youtube.com/watch?v=0YRd...
#astronomy #astrophotography #space #nebula
Video about the telescope: www.youtube.com/watch?v=0YRd...
#astronomy #astrophotography #space #nebula
September 8, 2025 at 8:25 PM
Dark Shark Nebula taken with the Askar 91F. Only 82 mins of integration time from a Bortle 3 location.
Video about the telescope: www.youtube.com/watch?v=0YRd...
#astronomy #astrophotography #space #nebula
Video about the telescope: www.youtube.com/watch?v=0YRd...
#astronomy #astrophotography #space #nebula
This was a fun video I made a few months back. I ran some simulations, and I showed how SNR decreases for each pixel (i.e., the signal and noise of each pixel decreases; the net effect is lower SNR).
#astrophotography
youtu.be/lnyrLQEgoc4
#astrophotography
youtu.be/lnyrLQEgoc4
The Truth About Pixel Size and Shot Noise (It’s Not What You Think)
YouTube video by Deep Sky Detail
youtu.be
September 4, 2025 at 12:58 AM
This was a fun video I made a few months back. I ran some simulations, and I showed how SNR decreases for each pixel (i.e., the signal and noise of each pixel decreases; the net effect is lower SNR).
#astrophotography
youtu.be/lnyrLQEgoc4
#astrophotography
youtu.be/lnyrLQEgoc4
I'm Glad We're Here.
#Astrophotography
#Astrophotography
September 2, 2025 at 3:11 AM
I'm Glad We're Here.
#Astrophotography
#Astrophotography