Cassini observes Saturn Solstice while preparing for its sixth ring-grazing. This only happens every 15 Earth years, experts say.
This year, the "strawberry moon" marked the summer solstice since both events occurred at the same time.
The summer solstice arrived this week, marking the longest day of the year, and while for many this may mean no more than an entertaining doodle on Google, for others it marks a day of pilgrimage.
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