World Space Week 2026 begins Sunday: the Rocket Revolution theme

World Space Week starts Sunday and runs through Oct. 10. The United Nations describes it as a celebration of space science and technology and what they contribute to everyday life.

The dates mark two firsts. On Oct. 4, 1957, the Soviet Union launched Sputnik 1, the first artificial satellite. On Oct. 10, 1967, the Outer Space Treaty took effect, setting out basic principles for how countries explore and use space.

This year's theme is "Rocket Revolution." According to the UN, it focuses on how access to space has changed. Launches used to belong almost entirely to national governments. Now commercial companies, reusable rockets, university teams, startups and newer national space programs are all part of the picture, and that changes how often launches happen and who gets to go.

You probably use that change daily without thinking about it. Weather forecasts, GPS directions and satellite internet all depend on hardware in orbit.

The week is a good excuse for a free family outing. Many science centers, planetariums and libraries hold World Space Week events, so check what is near you.

Tonight's easy activity: step outside after dark and look for a moving point of light. Apps and websites that track satellites can tell you what just passed overhead.