Video narration
How can the James Webb Space Telescope see faint, ancient galaxies? Like a phone camera, it collects incoming light, focuses it, and records it with a detector. But Webb is more than a bigger zoom lens. Light hits its huge segmented mirror, then enters scientific instruments. The twist: it detects infrared, light your eyes can't see. Its sunshield blocks heat, keeping Webb cold so heat doesn't swamp those faint signals. That’s how Webb makes faint, ancient galaxies detectable.