Our PixInsight processing guides are designed to be easy-to-follow tutorials with images and instructions. Learn how to process images of the subject step-by-step and achieve a result that you can be proud of! Processing guides can be accessed with the Processing Bundle or purchased individually.

  • Lifetime access with free updates

  • Compatible across platforms (Windows, Mac, Mobile...)

  • 21 videos with commentary | Written workflow for each step

  • Downloadable videos for offline learning

Get the BEST out of your Files

Don't underestimate how much potential your data has! Reveal all the intricate details within the core and arms of your galaxy, and see what you truly captured during the night.

What People Say

Jeffrey Adamy

5 star rating

“This was my favorite course. Easy to follow along and the process can dramatically change your image for the better. ”

“This was my favorite course. Easy to follow along and the process can dramatically change your image for the better. ”

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Aerial Drone Master

5 star rating

“The course is great for beginners, everything is explained in easy to understand language with plenty of examples Tom Toka ( Aerial Drone Master )”

“The course is great for beginners, everything is explained in easy to understand language with plenty of examples Tom Toka ( Aerial Drone Master )”

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Edward Mizzi

5 star rating

“I was looking for a resource that would guide me, step by step and this workflow does just that, Thanks to Galactic Hunter for developing these resources and offering them at reasonable prices.”

“I was looking for a resource that would guide me, step by step and this workflow does just that, Thanks to Galactic Hunter for developing these resources and offering them at reasonable prices.”

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Karl Morris

5 star rating

“I think overall this was an excellent tutorial. I moved away from PS, the learning curve for me was jumpy and all over the place form online sources,, Two weeks ago I downloaded Pixlnsight went through an in depth short course for the basic founda...”

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“I think overall this was an excellent tutorial. I moved away from PS, the learning curve for me was jumpy and all over the place form online sources,, Two weeks ago I downloaded Pixlnsight went through an in depth short course for the basic foundations and understandings to get me to a start point. If your a true beginner, maybe buy Galactic Hunter Beginner PixInsight Processing Guide, then move to this. This was exactly what I was looking for after that foundation study. This is targeted towards narrowband, causing me hesitancy as I only have a OSC, I do use dual/tri band filters with the OSC, and if I wanted to keep the channels separate during processing this tutorial has given me great insight in how to do that. I also had no issues following the process just using OSC data. Nothing less than a 10/10 here, two slightly different workflows would be have been nice though, maybe with two different Nebula. The interface is seriously 10/10, great job! Ease of Use 10/10 Value 10/10 Awesome job!! ”

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Jason Knight

5 star rating

“Good job”

“Good job”

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Course Curriculum

    1. Welcome to our Galaxy Processing Workflow!

      FREE PREVIEW

    2. Table of Contents

      FREE PREVIEW

    3. How to Read this Guide

    4. Before We Start

    5. Download our Process Icons

    6. Download our Raw Data

    1. Blink

    2. [Optional] Cosmetic Correction

    3. Weighted Batch Pre-Processing

    4. Common Stacking Issues

    5. [Optional] Stacking Without the Script

    1. Dynamic Crop

      FREE PREVIEW

    2. Background Extraction

      FREE PREVIEW

    3. Star Size Reduction and Detail Enhancements

      FREE PREVIEW

    4. Noise Reduction

      FREE PREVIEW

    5. Combining the Channels and Adding HA to RGB

    6. Stretch to Non-Linear

    1. Green Removal

    2. Star Extraction

    3. [Optional] Removing Unwanted Reflections

    4. GraXpert

    5. GAME Mask

    6. Detail Enhancements

    7. Color Curves

    8. Dark Structure Enhance

    9. Adding the Stars Back

    10. Reducing the Size of the Stars

    11. Final Curves and Image Export

    1. Final Touch using Lightroom

    2. The Final Image

    3. Before you go...

    4. The Galactic Course Ultimate Bundle

    1. How to Install the Gaia Catalogs

    2. [Optional] Spectro-Photometric Color Calibration (SPCC)

    3. HDR Composition - Combine Different Exposure Times

    4. Case Study #1: Processing Messier 61

    5. Case Study #2: Processing Messier 31 - The Andromeda Galaxy

    6. Case Study #3: Processing Messier 33

About this course

  • $50.00
  • 38 lessons
  • 3 hours of video content

Stack your Galaxy files

Use the WBPP script or individual processes to get your Master files

Get rid of unwanted files, then learn the best way to stack your galaxy files using PixInsight. Use the WBPP script to easily stack all your data together, but also learn how to stack without script, just in case! We'll also teach you how to deal with common stacking errors you may encounter.
How to stack on PixInsight

Combine Monochrome Channels

From Gray to Color

Learn how to properly combine different monochrome files into one color image. Follow the proper way to transform your R, G, and B monochrome files into a single RGB Master.
Learn to combine channels into one

Easily Add HA to RGB

Show the nebulosity regions in your galaxy's arms!

This guide also teaches you how to combine HA data with your RGB file, so that you can highlight the regions of star formations in the spiral arms in your image! This makes a huge difference in the final result, especially in targets rich in star-forming regions, like M101, M51, M106, M31, M33, and many more.
How to add Ha to RGB on PixInsight

Remove Reflections in Seconds

3 Ways to Easily Remove those Pesky Reflections

In the guide, learn 3 different ways to remove any light reflection you might have in your own images. These sometimes occur when your target is near a bright star, and can totally ruin your picture! Here, you'll know how to use PixInsight and/or Photoshop to remove them in a few clicks.
Learn to combine channels into one

Ready to Process?

Monochrome R+G+B+HA

Whether you are planning to use your own data or the provided raw data, you can be certain to get great results. Thanks to its easy-to-follow structure, you will be able to open this guide on the side every time you work on a new image until you have absorbed all the steps and techniques naturally. Follow the lessons and see how you can achieve a fantastic result on your data using our workflow. Learn to bring out the details, reduce the noise, and show rich colors in your galaxy.
Galaxy Processing Guide PixInsight

Get the Galaxy Processing Guide Now

Instantly access our Galaxy Processing Workflow and start learning immediately!

Buy Now

Bonus Material

  • Raw Data

    This workflow contains high-quality R-G-B-HA raw data of the Pinwheel Galaxy (M101). You can download this data to practice or follow along with the guide.

  • Process Icons

    Download our custom PixInsight process icons and easily import them into your own PixInsight window! This will help you save time during processing and teach you how to manage icons.

  • Discount for Ultimate Bundle

    Upon completion of this course, you receive a $50 discount for access to our Ultimate Bundle - which provides access to all courses and guides, plus perks.

Extra Content!

Learn processing techniques for various types of galaxies

Additional 4K walkthrough tutorial videos are added to the guide over time as "case studies". These commentary videos teach you how to process different objects from start to finish so that you can get the same result as ours! These are useful as they help you learn how to work with various types of targets.
Processing the M61 Galaxy

Antoine Grelin

Instructor Bio:

Antoine Grelin is a French-American astrophotographer and is one-half of Galactic Hunter. Along with his wife Dalia, Galactic Hunter offers astrophotography tutorials, guides, gear reviews, and complete courses for all levels of skill and equipment. Galactic Hunter images have been featured in NASA publications, Astronomy Magazine, BBC, and PBS Television, and have been recognized with awards from APOD, AAPOD2, and Flickr Explore.

Antoine Grelin

Instructor

Awards & Features

Our astrophotography has been featured in the following and many more:

  • AAPOD 2 Logo
  • PetaPixel France
  • NASA Logo
  • BBC Sky At Night magazine
  • PBS Outdoor Nevada astrophotography
  • Universo Magico Logo
  • ZWO Logo
  • QHYCCD logo
  • Space Junk podcast logo
  • The Andromeda Galaxy astrophotography with a telescope
  • The Phantom Galaxy astrophotography with a telescope
  • M51 Galaxy astrophotography with the Deep Sky Collective

FAQ

  • Do I need my own files to use the course?

    Not necessarily. We encourage you to use your own data, but also provide high-quality master files of the Pleiades that we shot from the Nevada desert! You can download these files to follow along and do exactly what we do in the videos with the exact same files. This is great if you'd like to practice before using your own data.

  • How long will I have access to the course material?

    Courses that are purchased individually give you lifetime access with no expiry date. Bundles on the other hand, which include all courses at a low price, have a small yearly renewal fee. More info on that can be found on the bundle pages.

  • What kind of support is available if I have questions during the course?

    We receive a lot of emails and messages on social media each day from people seeking help with astrophotography. We do our best to reply to everyone, but it is not always possible. We prioritize emails from both Galactic Course members and Patreon.

  • Can I access the course on mobile devices?

    Yes, you can access the course on any device, which include computers, tablets, and smartphones.

  • Can I access the course offline?

    The course lessons are hosted on an online platform, but you will have the option to download the videos and watch them at any time, even when offline!

Additional Products

Check out our Ultimate Bundle and other processing guides