Decades ago, Andy Morris-Friedman didn’t imagine that the odd collection of stones he stumbled upon during a bike ride would lead to involvement in a community for more than 25 years — and that he’d be one of the ones keeping it alive after the woman who built it died.

Astronomy-lovers have been gathering since the mid-1990s each solstice and equinox — the days the seasons change — at the UMass Sunwheel, a group of stones that mark the angles of sunrises, moonrises and other celestial events.

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