Ready for your close-up? How space satellites are changing life as we see it

Thousands of satellites are launched into space every year and have become our "eyes in the sky" on climate change, agriculture and national security. The development of modern satellite technology started here in Massachusetts. Now, almost anyone can buy images from space online.

We explore how satellite imagery is changing the way we see our world — from the daily weather forecast to troop movements in Ukraine. The discussion is part of a new biweekly series called "Tech Talk," with Boston Globe technology writer Hiawatha Bray.