# Planetary Defence.. Scanning The Sky And Protecting It from Asteroids. How?

An episode of [Desi Deep Dive | तर्क और तथ्य](https://invisiblenetwork.ai/podcast/1878634138), 23 Feb 2026, 34 min.

Audio: https://anchor.fm/s/10f357694/podcast/play/115933529/https%3A%2F%2Fd3ctxlq1ktw2nl.cloudfront.net%2Fstaging%2F2026-1-23%2F418674451-44100-2-8cd1f7e7d2aa1.m4a

Of known near-Earth asteroids, over 2,300 are classified as "Potentially Hazardous Asteroids" (PHAs) — meaning they are large enough to cause regional or global damage AND pass close enough to Earth's orbit to be a concern.

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