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Sun with Lots of Spots (August 25, 2024).jpg

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The Sun near solar maximum with a lot of sunspots on its disk, about as many as there can be at any one time, as this was August 25, 2024 near the time of solar maximum in the 11-year solar cycle. Though as of this date the time of solar max had not been determined yet.

Also visible are bright regions called faculae and the fine-scale granulation on the solar disk. The edges of the Sun are darker than the main disk — an effect called limb darkening. The north pole of the Sun is at about the 11 o'clock position on the disk, so not straight up. The camera was oriented so up was sky north.

The biggest group below centre is Sunspot #AR3799.

This is a stack of 4 x 1/400th second exposures, taken with the Astro-Physics AP130 refractor with 2X Barlow for a focal length of 1560 mm and at f/12 and with the Canon R5 at ISO 100. The seeing was not particularly good this day. The filter was a Kendrick/Baader white-light Mylar filter. Colorization was in Camera Raw processing.
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The Sun near solar maximum with a lot of sunspots on its disk, about as many as there can be at any one time, as this was August 25, 2024 near the time of solar maximum in the 11-year solar cycle. Though as of this date the time of solar max had not been determined yet. <br /> <br /> Also visible are bright regions called faculae and the fine-scale granulation on the solar disk. The edges of the Sun are darker than the main disk — an effect called limb darkening. The north pole of the Sun is at about the 11 o'clock position on the disk, so not straight up. The camera was oriented so up was sky north. <br /> <br /> The biggest group below centre is Sunspot #AR3799. <br /> <br /> This is a stack of 4 x 1/400th second exposures, taken with the Astro-Physics AP130 refractor with 2X Barlow for a focal length of 1560 mm and at f/12 and with the Canon R5 at ISO 100. The seeing was not particularly good this day. The filter was a Kendrick/Baader white-light Mylar filter. Colorization was in Camera Raw processing.