Monday, April 22, 7:30 – 9:30 pm

Join us at the Heide Observatory for an immersive program kicking off our Earth Week events at Hawthorn Hollow Nature Sanctuary and arboretum. Discover the significance of dark skies through engaging activities, including stargazing, telescope observations, and hands-on demonstrations. Explore the impact of light pollution on humans and wildlife, and learn simple solutions to preserve our natural heritage. Whether you’re a seasoned astronomer or a curious novice, join us as we celebrate Earth Day and nurture our connection to the cosmos and our planet.

This is an open house event so no tickets are required. Activities include :

Telescope viewing
Stargazing – apparent magnitudes
Human eye response to light color and brightness
Isopod light response

If you have any additional questions, please email These events are weather-dependent and will be rescheduled if the cloud cover forecast is greater than 40%.
Dress appropriately for nighttime outdoor weather.
Purchase tickets here or email