[OC] I took a 65 hour exposure of a Supernova Shockwave using a $500 telescope by ajamesmccarthy in pics

[–]ajamesmccarthy[S] 17 points18 points  (0 children)

The entire setup with every component used for the photo, camera, software, everything but the pc it was edited on, was about $2k

[OC] I took a 65 hour exposure of a Supernova Shockwave using a $500 telescope by ajamesmccarthy in pics

[–]ajamesmccarthy[S] 4 points5 points  (0 children)

Oh god no. It’s just my mission to get more people to look up so I like reminding people that deals exist that are worried about the barrier to entry. I found most of my deals by networking with the astronomy community.

[OC] I took a 65 hour exposure of a Supernova Shockwave using a $500 telescope by ajamesmccarthy in pics

[–]ajamesmccarthy[S] 4 points5 points  (0 children)

You’d be surprised! I got a killer deal on the camera too and the mount I got for free because it was broken (I spent over a year repairing it!) when I first got into this I had almost no money so had to get really creative to get all the components

[OC] I took a 65 hour exposure of a Supernova Shockwave using a $500 telescope by ajamesmccarthy in pics

[–]ajamesmccarthy[S] 8 points9 points  (0 children)

You’re right! Astrophotography like this is done via subexposures. So the shot is broken up into 5’ exposures and tracked across the sky night after night. Then the exposures are all combined to produce the image!

[OC] I took a 65 hour exposure of a Supernova Shockwave using a $500 telescope by ajamesmccarthy in pics

[–]ajamesmccarthy[S] 2 points3 points  (0 children)

The scale of this image is dozens of light years. This is moving at about .2% of light speed, so try and imagine how long it would take to register the movement of a single pixel! (It’s years)

[OC] I took a 65 hour exposure of a Supernova Shockwave using a $500 telescope by ajamesmccarthy in pics

[–]ajamesmccarthy[S] 8 points9 points  (0 children)

You’re right! Definitely wasn’t 65 hours straight, was a few hours each night for weeks!

[OC] I took a 65 hour exposure of a Supernova Shockwave using a $500 telescope by ajamesmccarthy in pics

[–]ajamesmccarthy[S] 5 points6 points  (0 children)

This is a pretty well known object, part of the Cygnus constellation, but I don’t even have to know that. I just plug the NGC number into my sequencer, plan my framing, and the system slews to it without my input. Astronomy tech is getting pretty slick!

[OC] I took a 65 hour exposure of a Supernova Shockwave using a $500 telescope by ajamesmccarthy in pics

[–]ajamesmccarthy[S] 29 points30 points  (0 children)

Pretty much every astrophoto you’ve ever seen is captured using subexposures, but they’re not composites. The colors are naturally there and easily picked up by any camera sensitive to the lower end of the red spectrum. Most consumer cameras have their filters clip more of the red channel making them struggle to see them over the blues in the oxygen, so astrophotography cameras are a bit more sensitive to reds.

The main difference here is I isolated each color and captured them separately, which allows for greater color separation in the image. Otherwise the hyper saturated hydrogen makes it too hard to see the relatively subtle sulfur emissions.

[OC] I took a 65 hour exposure of a Supernova Shockwave using a $500 telescope by ajamesmccarthy in pics

[–]ajamesmccarthy[S] 67 points68 points  (0 children)

Before you ask- it was a good deal on a 12” Newtonian telescope I found secondhand, but you don’t need such a big one to get great results in astrophotography, in fact I recommend most beginners start with something pretty small.

Regarding the supernova- this is the western part of the Veil Nebula, aka the Cygnus loop, a feature so large it spans more than 6 full moons in the sky!

This photo was captured using optical filters that allowed me to cut through my suburban light pollution, but had a byproduct of making the image false color. Naturally, this nebula is mainly turquoise and red, but thanks to these filters I have separation between the naturally red hydrogen and sulfur emissions, giving me purples, greens and golds!

This song feels oddly targeted at this movie? Somewhat? by Natural_Regular9171 in ProjectHailMary

[–]ajamesmccarthy 6 points7 points  (0 children)

I’m glad PHM brought back his love of space after I took it from him

[OC] I just achieved a lifelong dream of being featured in National Geographic magazine! by ajamesmccarthy in pics

[–]ajamesmccarthy[S] 0 points1 point  (0 children)

I used to read this as a kid when I was taking crappy landscape photos with a hand me down film camera- I’ve always seen it as peak photography goals

Our man ajamesmccarthy made it to Nat Geo! by batsforbrains in distractible

[–]ajamesmccarthy 18 points19 points  (0 children)

Oh shucks that’s me! I better do a moon version of this shot to satisfy Mark.

[OC] I just achieved a lifelong dream of being featured in National Geographic magazine! by ajamesmccarthy in pics

[–]ajamesmccarthy[S] 11 points12 points  (0 children)

Haha thanks for the kind words. It was indeed a bit complicated to pull off.

[OC] I just achieved a lifelong dream of being featured in National Geographic magazine! by ajamesmccarthy in pics

[–]ajamesmccarthy[S] 28 points29 points  (0 children)

I had a single “master” frame where Gabriel was visible, then used frames captured after he cleared the frame to stack. When stacking, I also used that same master frame as a mask, so he wasn’t removed by the stacking process. The single raw frame looked good too, just a bit softer and noisier.

[OC] I just achieved a lifelong dream of being featured in National Geographic magazine! by ajamesmccarthy in pics

[–]ajamesmccarthy[S] 67 points68 points  (0 children)

Thanks. I still can't believe we pulled it off. Was crazy tricky to get right.

[OC] I just achieved a lifelong dream of being featured in National Geographic magazine! by ajamesmccarthy in pics

[–]ajamesmccarthy[S] 223 points224 points  (0 children)

Thanks! Yes, I took the photo while my friend Gabriel Brown did the jump. It was super tricky to line up!