The Museum of Science is running a museum-wide celebration of the exploreies that rewired how we understand the world, staged in its landmark home straddling the Charles River between the West End and Cambridge. Themed Celebration Days anchor the program, each spotlighting groundbreaking scientists and bold ideas with hands-on activities, live demonstrations, and conversations with working researchers and educators.

The headline experiences lean cosmic: an exhibit tracing the high-stakes effort to build the James Webb Space Telescope and send it a million miles from Earth, plus a celebration of the first all-civilian mission to orbit, told through the eyes of its pilot, Dr. Sian Proctor. It’s built for the museum’s usual all-ages mix — curious kids, school groups, and adults — and it makes an ordinary visit feel noticeably bigger.