What would happen if all satellites stopped working?

The world would keep running, but it would get a lot less coordinated, accurate, and resilient very fast.

Biggest impacts:

• Navigation breaks down: GPS and similar services would stop, affecting phones, cars, ships, drones, and many aircraft.
• Weather forecasts worsen: Fewer satellite observations means weaker storm tracking, poorer hurricane updates, and less visibility on clouds and smoke.
• Remote communications fail: Satellite phones, TV, remote internet links, and services like Starlink would go offline.
• Timing problems spread: Some banking, telecom, and network systems use satellite timing, so outages or sync glitches could happen.
• Transport and logistics slow: Shipping, aviation, and precision farming would lose important guidance and tracking.
• Defense and emergency response lose tools: Communications, reconnaissance, and precise positioning would be degraded.

What would still work: fiber internet, local cell networks, radar, weather stations, ground-based navigation backups, and many day-to-day services.

Bottom line: not an instant collapse, but major disruptions across travel, forecasting, communications, and synchronization until other systems picked up the slack.