My latest project is now done: Messier 27 or "The Dumbbell nebula".

This nebula was formed by a dying star, shedding away its gas shell into space at several dozen km /s !

Visible are different shockwaves that travels at different speeds throughout the nebula. In its center, the remnant of the star (a white dwarf) is visible.

Red is hydrogen, blue oxygen and green sulfur.

over 20h of total exposure time (narrowband).

from last night

Haven't used this telescope in ages (a Celestron 8" SCT). Collimation was really off and also focus was not perfect. Will be doing this again next week with hopefully better results!

Currently imaging Messier 27 (The Dumbell nebula) over several nights in narrow-band.

Here is a comparison of how this nebula looks like in different spectras (hydrogen vs oxygen vs sulfur)

Went in yesterday at the aletsch glacier!

What a wonderful view up there! However, all my muscles are sore now 😅

The final processed result of the Hercules star cluster

This globular star cluster (globular meaning it's a sphere, which is the most dense in its center) is a satellite of our Milky Way galaxy and is located around 24k light years away and holds hundreds of thousands of stars in its very dense packed sphere with a diameter of 145 light years.

The stars are packed so densely together, that occasionally stars collide!

The difference exposure time makes!

4h of exposure time vs 1minute of exposure time

This is luminance data, a balanced mix over the whole visible spectrum

M101 - The Pinwheel Galaxy

This was quite the project, got 15h of exposure time on this galaxy and got quite the nice result.

The has an irregular spiral shape, most likely caused by a merger with another galaxy or strong gravitational forces acting on the galaxy.

Next to it is NGC5477, a small dwarf galaxy orbiting M101.

For more details see theuberger.ch/post/astrophotog

Also two of my photos are currently displayed in the "Naturmuseum" , as part of the "Eroberung der Nacht" exhibition

The fameous Leo Triplet with over 10 hours of exposure time!

This group of 3 galaxies is located roughly ~30 Million Light years from earth.

Apart from the 3 big galaxies, there are quite a few smaller, a lot more distant ones in the background, can you spot them?

According to its red shift, one of those is even ~1.75 billion light years away! That's quite insane.


@photography

Now moving on to image the galaxy M101 (also called "Pinwheel Galaxy") for the rest of the night. Already got almost 5h of exposure time on the galaxy.

Will probably need another clear night to complete the dataset and stack all the seperate exposures together to get one very long exposure.

What you see here is a 2min exposure in black&white of the full light spectrum (luminance)

The moon from just now through my .

Depending on its current phase, the moon usually is by far the biggest source of light pollution (at least where I live).

Currently busy measuring the DARK current on the replacement camera. These can then be averaged (per exposure time).

DARK Current of a camera describes the amount of signal you get without any light hitting the sensor, also known as "noise" 😅 Basically taking photos with the camera in total darkness.

The averaged DARK Current can then be subtracted from the real photos, basically subtracting the cameras noise, leaving almost only signal.

Some of the noise will remain though due to its random nature.

How it looks like when a satellite (or something else in low-earth orbit) photo-bombs your telescope imaging session.

The line going from the top middle to the left middle is the satellite traveling through the field of view during the exposure of the photo.

And with new satellite constellations being launched (like ) this will happen a lot more often and will become harder to "fix" in post-processing

A single 2min exposure (Luminance, meaning full visible spectrum with a monochrome camera) of the fameous Leo Triplet (3 Galaxies in the constellation of Leo).

Got a few hours of luminance data so far, need to get some more clear skies and take some RGB data to give it color and stack all the images together, to get one long exposure photo.

@photography

Got a replacement camera for my telescope today, and after doing some tests on the raspberry pi controlling the telescope, it seems to be working fine!

Waiting for clear a clear night to complete my image of the Leo Triplet 😄 🔭

Just got good news, my astro-camera broke down sometime the past few weeks (it only produces completly black images), however, I am getting a replacement from the camera manufacturer (warranty)

So I am going to be imaging again soon :)

IC405: The flaming star nebula in HSO palette.

This really does look like a flaming star. Being another narrow-band photo, the red color in this photo represents Hydrogen, Green represents Sulfur and Blue represents Oxygen.

Total exposure time is 20hours! 10 hours for Ha and 5h for OIII and SII each.


@photography

Currently working on processing a new photo and wanted to do a quick poll, which photo / colors do you like better?

Left is Hubble palette, right is HSO (as in Red is Hydrogen, Green is Sulfur and Blue is Oxygen)

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