International Dark Sky Week Community Stargazing at Altar Rock

Join us in celebrating International Dark Sky Week with a community stargazing event at Altar Rock in the Middle Moors, hosted by the Nantucket Conservation Foundation, Nantucket Lights, and the Maria Mitchell Association.

This free, family-friendly event invites participants to experience Nantucket’s night sky as it was meant to be seen—dark, expansive, and full of wonder—while learning how light pollution threatens wildlife, human health, scientific research, and our ability to experience the stars. Protecting dark skies is a vital part of conserving Nantucket’s natural and cultural heritage, and this evening offers a chance to understand how simple lighting choices can make a meaningful difference.

Guided by expert stargazers and dark-sky advocates, attendees will explore constellations and seasonal celestial highlights in one of the island’s low-light environments. Together, we’ll reflect on why dark skies matter and how community action plays a critical role in preserving them for future generations.

Parking will be available along Altar Rock Road, with volunteers assisting attendees safely to the viewing area after dark.

Please dress warmly and consider bringing blankets, as evening temperatures can be cool.

Weather contingency:
In the event of cloud cover or rain, the program will be rescheduled for Friday, April 17. Registration is encouraged so we can communicate updates if postponement is necessary.