Learn

      • Blog
      • Academy
      • About us
      • Forum

      Legal

      • Privacy Policy
      • Cookie Policy
      • Terms & Conditions

      Pricing

      • Plans

      Tutorials

      • All tutorials
      • Our tutors
      • Webinars

      Follow us

      • Facebook
      • Instagram

      Datasets

      Mark Johnston
      4 credits

      Sunspot active region Jan 20 2026

      L
      3m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes
      Mark Johnston
      5 credits

      AR4633 active region in high resolution broadband

      L
      3m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes
      Mark Johnston
      5 credits

      Sunspots Jan 16 2026

      L
      3m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes
      Mark Johnston
      5 credits

      Striking prominence Aug 18 2025

      H
      30m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes
      Mark Johnston
      6 credits

      Dual prominences August 3 2025

      H
      30m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes
      Mark Johnston
      4 credits

      Raised filament from Aug 2 2025

      H
      30m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes
      Mark Johnston
      6 credits

      Solar activity July 29 2025

      H
      30m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes
      Mark Johnston
      12 credits

      Active prominence transition (5 images)

      H
      9m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes
      Mark Johnston
      4 credits

      Sun Prom and sunspots July 15 2025

      H
      30m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes
      Mark Johnston
      3 credits

      Sunspots with lonely spicule

      H
      30m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes
      Mark Johnston
      6 credits

      Solar prominences on April 15 2025

      H
      30m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes
      Mark Johnston
      4 credits

      Multiple prominences April 26 2025

      H
      9m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes