Tuesday, March 11, 2025

The Sun in white light

The Sun is a G-class Main squence star; it is a yellow dwarf, but is at the hotter end of that group of stars. It is actually white as seen from space and high altitudes. It takes on a yellowish hue at sunrise and sunset due to atmospheric refraction. 

I tend to reflect the fact that the Sun is white in the way I render white light solar images. Here is an image made today by capturing 2 overlapping 1000-frame SER files with AstroDMx Capture and an SVBONY SC715C OSC camera through an 80mm Ekinox ED refractor with a photographic grade Baader solar filter. The telescope was mounted on an iOptron CubePro GOTO Altaz Mount with GPS. The best 90% of frames in each SER file were stacked in Autostakkert!4, stitched in MS ICE, wavelet processed in waveSharp and further processed in Gimp 2.10 and ACDSee. Here are two renderings of today's Sun correctly orientated

Click on an image to get a closer view

The Sun in white light



Steve Wainwright and Nicola Mackin

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