Helium D3 line

Imaging the Sun in the Helium D3 line (HeID3). For details see picture.

Sun on August 17: H-alpha and CaIIH and K line

Using my new Sol'Ex by James R. I'm making progress to get the images sharper and sharper. But it's not yet 100% sharp, mainly in one area. So more works to do. Turing the collimator wheel about 10times "in" starting from H-alpha settings, I got a really sharp CaII H ad K-line sundisk.

Solar Scintillation Monitor SSM3 and SharpCap

After downloadoing the latest version of SharpCap (adjusted for the SSM3 bug) I connected my Solar Scintillation Monitor SSM3 (See https://www.analog-astronomical-device.ch/solar-scintillation-monitor). . Using the tools menu and selecting Solar Scintillation Monitor, the SSM3 can be connected. The result works very good with a good graphic follow up.

Overal seeing below 2 arcs with moments even lower.

The increase is due to upcoming high clouds

For instructions to connect the SSM3 with SharpCap see https://forums.sharpcap.co.uk/viewtopic.php?p=48907#p48907 (New Feature : Support for Solar Scintillation Monitors).

1 Year to Go : Total Solar Eclipse August 12, 2026

1 Year to go for the Total Solar Eclipse of August 12, 2026 which starts in Greenland, over Iceland and Spain.

Venus-Jupiter Conjuction

Venus passes south of planet Jupiter this morning. I got up very early and went to Schaffen to get a free eastern horizon. Images mad with my Nikon D7500.

Wetenschap in beeld: Grootste raadsels van de natuurkunde

 

Speciale editie van Wetenschap in Beeld met de grootste raadsels van de natuurkunde. Ideaal voor deze periode en leest gemakkelijk.

Sunset

Sunset at the Northsea in De Haan