Planetary Defense 101: How Scientists Detect and Deflect Dangerous Asteroids

Planetary Defense 101 is a focused, beginner-friendly science class in Cincinnati, Ohio that walks visitors through the realities of asteroid impacts and the modern tools used to spot and stop hazardous space rocks. In a single 1.5-hour session, the instructor presents the cadence of cosmic hazards—from micrometeorite dust to rare, civilization-altering impacts—and explains how telescopes, sky surveys, and planetary science combine to detect threats well before they reach Earth. The session includes admission and telescope viewing when skies are clear, and accommodates groups up to 35. The experience feels part lecture, part live demonstration. You’ll learn how orbital tracking turns pinpricks of light into calculated trajectories, how radar and infrared surveys help size and characterize objects, and why a small change in velocity can divert a future strike. The class outlines the major mitigation concepts researchers pursue today: early warning, kinetic impactors, gravity tractors, and civil defense strategies. Presentations use real data and historical case studies to show how frequently large impacts occur and what past events have taught scientists about risk. Locally, this class offers a rare chance to bridge Cincinnati’s public-facing astronomy resources with a topical global conversation about planetary safety. Key features include guided telescope time (weather permitting), clear explanations of Near-Earth Objects (NEOs), and a tight, interactive format that welcomes questions from novices. Unique natural phenomena covered in the talk include Near-Earth asteroids, comets, and the telltale traces of past terrestrial impacts preserved in the geologic record. The program highlights both the science and the stakes: why monitoring the sky matters for communities everywhere. Practical visitors’ notes: arrive ready to take notes and to step outside for telescope viewing if conditions allow. Accessibility, pricing, and meeting-point details are provided at booking; the class is introductory and appropriate for adults and curious teens. If you’re an educator, student, or simply someone drawn to clear, data-driven explanations of a dramatic subject, this session translates complex planetary defense concepts into accessible actions you can understand after one informative evening in Cincinnati. Planetary Defense 101 is an exceptional local offering for travelers who want a grounded, science-first look at humanity’s strategies for surviving cosmic hazards. It turns an abstract headline—“asteroid threat”—into concrete tools, techniques, and questions you can understand after one informative evening in Cincinnati. Expect opportunities to ask about how space agencies coordinate international tracking networks, and how amateur astronomers contribute crucial observations. Teachers and parents will appreciate classroom-ready examples and suggested resources to continue learning after the lecture. Bring a notebook and comfortable shoes; the session can include brief outdoor time. Whether you visit with scientific curiosity or plain wonder, this class arms you with clear concepts and practical context for one of civilization’s most compelling planetary challenges.