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Sunspot in Hydrogen Alpha. Clearly visible are the magnetic plasma streams.

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4x Home
Astronomy
- Glossary
- Mapping the sky
- Astrometry
- Universe Sandbox
  - Application
  - Video
- Cosmographia
- Phenomena
- Objects
(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
- 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
- Filters
- Mount - Computer - Guidance
- Optics
- Powerstation
- Software
- Troubleshooting
- 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
Misc. Space & Links
- Binocular info
- Apollo landing sites
- Apollo 14
- Volkssterrenwacht Bussloo
- James Webb Space Telescope
- Shops on Astro
- Support Groups
  - Backlight
- Astronomy docuvideos
  - Star Talk
  - Brian Cox fan page
- Kwantum Physics
- Zenit
- Micrometeorieten