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Main spot of group 4513 in detail.
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Most recent edit:
24-10-2026
09:27 UTC
11:27 CET
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4x Home
Main Photography Site
Aurora Addict
Astrophotography
The Third Piglet
Astronomy
Glossary
Mapping the sky
Astrometry
Universe Sandbox
Application
Video
Cosmographia
Phenomena
Objects
Magnitude Expl.
Complete list of catalogues
Our Solarsystem (Dutch)
Messier objects (Dutch)
NGC New General Catalogue (Dutch)
NGC lijst
(SPACE)WEATHER
Understanding the sky
Viewing Conditions
Clear Outside
hemel.waarnemen.com (Dutch)
Rise and set of objects
Eclipse Info
Actual Spaceweather
Images
Comets
Earths moon
International Space Station
Jupiter
Messier Objects
Meteors
Milkyway
NGC Objects
Saturn
Star Clusters
Sun
Telescoopkabels
Venus
Blogs
My Blog
Misc. Advice
Astrophotography on MAC
Smartscope or conventional?
Deep Sky Or Planetary
Solar Photography (Facebook)
(My) Equipment
Generic Advice: The Space Koala
10 things to consider
10 things to avoid
My first steps
My considerations
Calculators
Cameras
Guidance Camera
Planetary Camera
Deep Sky Camera
Camera Rotator
DSLR / System
Sunsniper
Filters
OSC filters
Narrowband on Hyperstar/Rasa
Filter Advice by Lumo AI
Mount - Computer - Guidance
Tripod And Pier
Mount
Guidance
Computer
Optics
Telescope, Eyepiece, Focusser
Finder and Guide Scopes
Atmospheric Dispersion Corrector
Barlows And Reducers
Spacers
Bahtinov masks
Camera placement
Powerstation
Software
Overview
Mac Observatory
Siril
APP (Astro Pixel Processor)
PixInsight
RegiStax
AutoStakkert
Troubleshooting
Cable Management
Collimation
Focussing
General Operation
Mount control
Solar photography
Tests
Solar Cams and Barlows
Repairs
Solar
Photography
Objects to start with
Deep Sky
Meteors
TOP 5 Sky Events of 2026
The Moon
Try Apollo 11?
Basics and my first steps
Understanding the sky
Configure Optics
Parameter jungle for Deep Space
Mount Control
Platesolving and polar alignment
Books / Literature
FITS -> TIFF
Processing (click me too)
Stacking
Solar
Basics
Solar Telescope
Images
Troubleshooting
Misc. Space & Links
Binocular info
Roger Vine Scope Views
Zeiss vs Leica vs Swarovski 2015
Zeiss Victory SF 2015 vs 2016
Prisms and phase shifting
Apollo landing sites
Apollo 14
Volkssterrenwacht Bussloo
James Webb Space Telescope
Shops on Astro
Ganymedes
Robtics
Astroshop.eu
Bresser
Support Groups
Stellarmate Off. Support
Stellarmate Discord
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Astronomy docuvideos
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Brian Cox fan page
Kwantum Physics
Zenit
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