Learn how to use binoculars to find planets, galaxies, star clusters and nebulas and explore the star fields of the Milky Way. Bring binoculars if you have them. An observing session is included, weather permitting. Instruction is provided by Analemma Society volunteers.Ages 8 and older.
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Mah Jongg games in the Great Falls Library meeting room, fast‑paced play with other adults, for ages 18 and up.
Advanced French conversation takes place in the Great Falls Library conference room, offering informal discussion for fluent speakers, ages 18 and up.
Morning Tai Chi class at Hunters Woods Plaza, led by Hunters Woods Fellowship House residents, free drop‑in session, moves indoors during inclement weather, for all ages.
Interactive Chesapeake Bay aquarium at Glen Echo Park offers timed‑entry exhibits and educators for personalized learning, $10 per person, ages 2 and up.
Explore planets orbiting stars, watch stars flicker or wobble, and learn about their composition and habitability in the Roll‑Top Observatory, rain or shine, for ages 8 and up.
Explore moon craters, mountains, lava flows and view them through telescopes at the Roll‑Top Observatory, rain or shine, with Apollo mission talks, for ages 8 and up.
Explore light pollution effects on stars, circadian rhythms, birds, bats, insects, then learn solutions and check out a Dark Skies Light Pollution Monitoring Kit, ages 13 and up.
Haunted Mini Golf at Oakmont Rec Center offers trick‑or‑treat prizes at every hole, food trucks, popcorn and games; $15 online, $18 door, all ages.
Trick-or-treat on the farm with farm animals, crafts, games, and a decorated farmhouse tour, in one‑hour slots at Frying Pan Farm Park, for ages 2 and up.
Evening campfire at Hidden Pond Nature Center features nature walks, interactive activities, animal presentations and s’mores, all ages.
Physicist and author Dr. Michael Albrow discusses cosmic expansion, the big bang, and the universe’s ultimate fate in Reston Regional Library meeting rooms, ages 13+.
Nighttime lantern-lit tour of the historic house and 19th‑century gristmill shares local ghost stories, legends, and supernatural tales, ages 12 and up.
