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. Note: Lifetime access and updates are included when buying the guide separately, but can become costly with multiple guides.

  • Lifetime access with free updates

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

  • Videos with commentary

  • Written workflow for each step

Ready to Capture Comets?

Before you learn how to process images of comets, you should know how to capture one! As an extra bonus to this processing guide, we also have a video showing you exactly how we planned and photographed the "Green Comet". We show you how to find out what exact coordinates to use, how to set it up in NINA, and what settings to use to get the best possible picture of the moving object.
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Comet capture on NINA

Ready to Process?

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.
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Comet Processing Guide screenshot

What People Say

Jim Eckes

5 star rating

“Great Job. This answered a lot of questions.”

“Great Job. This answered a lot of questions.”

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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 Comet Processing Workflow!

    2. Table of Contents

    3. How to Capture a Comet?

    4. Processing - Before we Start

    5. Download our Process Icons

    6. Download our Raw Data

    1. Data Calibration and Stacking

    2. Getting Our Star Mask

    3. Comet Alignment

    4. Batch-Removing the Stars and Stacking the Data on the Comet

    5. Processing the Comet Image

    1. The Final Image

    2. Before you go...

    3. The Galactic Course Ultimate Bundle

About this course

  • $18.00
  • 14 lessons
  • 0.5 hours of video content

Bonus Material

  • Raw Data

    This workflow contains high-quality R-G-B raw data of the "Green Comet". 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.

Antoine Grelin

Instructor Bio:

Antoine Grelin is a French-American astrophotographer based in Las Vegas, 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

Additional Products

Check out our XXX Bundle and other processing guides