Martin Schoenmaker

You are obviously in Australia… everything has a spider probably 😅

Even your cassegrain has a spider…

The star field in the Orion Constellation. An inset shows Betelgeuse and Its stellar companion.

Gemini North telescope in Hawai‘i reveals never-before-seen companion to Betelgeuse, solving millennia-old mystery

noirlab.edu/public/news/... 🧪🔭

Credit image :International Gemini Observatory/NOIRLab/NSF/AURA; Image Processing: M. Zamani (NSF NOIRLab)

That is a whole lot more impressive than my DuoLingo streak 😅 💪👍

@dylanodonnell.bsky.social I was in London for work and found something that made me think of you

@dylanodonnell.bsky.social I was in London for work and found something that made me think of you

YouTube video by Martin Schoenmaker Mounting a reducer on the EdgeHD 9.25" together with an ZWO EAF and Celestron OAG - using a hacksaw

Hi there. A bit of #astrophotography madness for you. Did you know that mounting a reducer on an @celestronuniverse.bsky.social #EdgeHD925 can be a challenge? When there is a #ZWO #EAF mounted too, you need to reduce the bracket as well. #hacksaw

youtu.be/5hUqAVTlH88

In the photo it is about at it’s highest 🫣 11.3° according to my app.

That looks great! I have so far had two attempts at this target, but I am not satisfied yet. Need to find a spot where there is no light dome in that exact direction.

Ook een goedemorgen gewenst!

But now with the reducer it fits and I got a nice #firstlight

Mounting the reducer required the use of a hacksaw 😳

I’ll make a video of the footage I shot of that process.

The things you do for #astrophotography

Last week I attempted WR134 in Cygnus. It couldn’t fit in my FOV without doing mosaics at f/10. An initial test stack got me to this. 4 panels as is painfully clear from all challenges I got to endure.

#astrophotography

YouTube video by Martin Schoenmaker My EdgeHD got an enlargement - mounting EAF, OAG and ASI294MC Pro and then image the Moon.

Should’ve done this much earlier. I got a 9.25” @celestronuniverse.bsky.social #EdgeHD in july 2023. But it wasn’t until last night that I mounted the 0.7x reducer.

youtu.be/i9SymknulPk

Working on a YouTube video about #astrophotography at a 5000 year old burial site in the Netherlands.

Will take some time still as I am also learning #davinciresolve for this vid.

So sad, that this magnificent plane is in ruins now...

This movie shows the bubbling surface of a distant star, as captured with unprecedented clarity by the ALMA observatory.

R Doradus is a huge star. Each of these bubbles is 50-75 times the diameter of our entire Sun! 🧪🔭

www.almaobservatory.org/en/press-rel...

You sir, are a machine. I still have to make my 100th post since moving from the Blue Bird to this platform. I guess my content of Astrophotography isn't as interesting as yours. ;-) Or I post too few images.

M 90 and IC 3583 - astrophotography by schoenmaker Sterrenstof is a Dutch Astronomy podcast that tells the story of Astronomy targeting a wide public. In episode 48 they suggested the astrophotographers among their listeners to shoot and share images ...

How is your #Dutch? And you like #astronomy? Know @sterrenstofnieuws.bsky.social already? In their latest podcast (48) they suggest the #astrophotography enthusiasts amongst their listeners to shoot + share images of M90, a spiral #galaxy in Virgo.

Here is my attempt telescopius.com/pictures/vie...

YouTube video by Martin Schoenmaker May 2025, The ATT in Essen - An impression

I was at the #ATT in Essen, Germany. Europe's biggest expo, according to themselves.

I made a video touring the event. Were you there too? Did I miss anything? Feel free to leave me suggestions for next years edition on May 9th 2026

www.youtube.com/watch?v=3nOU...

#astronomy #astrophotography

Whirlpool Galaxy, NGC 5195, IC 4278 and IC 4277 - astrophotography by schoenmaker In preparation of an article about comparing your own images to those of the famous Hubble Space Telescope, I embarked on this project where a comparison between my image and that of the Hubble, make ...

My M51 project obsessive data mongering is done (for now). Curiously it was only the 4th time I was imaging this very well-known target.

As I have only been sharing the crop, I thought to also show the full field of view.

telescopius.com/pictures/vie...

#astrophotography #astronomy #celestron

Need to play with my data a bit more, but I am thoroughly impressed with the new @siril.org and its ability to stack and stitch mosaics.

Editing my data of M51, I tried pushing it to the extremes. I still think it is awesome to see so much resemblance between my @celestronuniverse.bsky.social backyard image and that of @stsci.edu #HST Hubble Space Telescope.

#astrophotography #astronomy #parallax #stars

On Instagram I share a view of how the explosion resulting in The Crab Nebula, might have looked. #astrophotography #astronomy

www.instagram.com/reel/DI7NvZE...

Expansion of M1, the Crab nebula over 20 years. #astronomy #astrophotography

My @celestronuniverse.bsky.social EdgeHD 9.25" compared to the @stsci.edu Hubble Space Telescope

Makes me want to read "Rendevous with Rama" again. Would've been cool if that gets turned into a movie.

I am still enjoying to compare my own #astrophotography images to those of the #HST and #JWST run by @spacetelescope.bsky.social. I improved an edit I did on Stephan's Quintet.

95x180s
@celestronuniverse.bsky.social EHD9.25"
ASI294MC Pro
L-Pro filter.

I am primarily using @siril.org

Still need to look into extracting Ha from my L-eXtreme data and subtracting continuum from it. I think that last part will allow me to add it more naturally to my OSC data.

I think it looks great already! I still have to complete my processing. Struggling with adding Ha to the data…

For this one it came out to be 368.6 ± 0.7 light-years

Great. Using the parallax value (8.3202 mas) I could calculate the distance to be 392 light-years. The error (0.1113 mas) gave an error margin of +/- 5 light-years.