Sun: Our sun has a mean distance from earth of about 93,000,000 miles, and a diameter of about 864,000 miles (a little more than a hundred times that of Earth). The sun is a very active body, changing noticeably by the hour.

For scale, I have added a white circle about the relative size of earth in the blackness in the lower right hand corner; click on the photo to toggle between the photo with and without that "Earth."

I had not taken a photo of the sun this year, so I took this. Nothing particularly dramatic is happening, but I always find all the structure on the sun to be fascinating, and I like the prominences.

Technical Information:

This is processed from a stack of 1050 images, taken at about 25 fps.

Equipment: Coronado SolarMax II 90 Double Stacked hydrogen alpha solar scope, with a BF30 blocking filter; images acquired with a Point Grey Research Grasshopper3 6mp CCD monochrome video camera (GS3-U3-60QS6M-C).

Image Acquisition/Camera Control: FireCapture

Processing: No calibration performed. Images stacked in AutoStakkert! 2, sharpened in RegiStax6, colorized and further massaged in Photoshop CC2017

Location: Redmond, Washington, USA

Date: Data acquired 19:14 UTC, May 23, 2017; image posted May 24, 2017

Copyright Mark de Regt, 2017