51.0 MB (1.8 MB compressed)
5069 x 3520 pixels
42.9 x 29.7 cm ⏐ 16.9 x 11.7 in (300dpi)
ALAN DYER / VWPICS / SCIENCE PHOTO LIBRARY ALAN DYER / VWPICS / SCIENCE PHOTO LIBRARY
Particularly large groups of sunspots on the Sun on September 4, 2017. The group at bottom is AR 2673, the group at top is 2674. The small spot at left on the emerging limb is AR 2677, while the groups disappearing at right are AR 2675 (top) and AR 2776.
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