When a potential asteroid strike became a real-world emergency

Planetary Defenders: This Is Not an Exercise · 20:15 · Video: NASA · Watch at the source

In short: Watch how NASA and the global scientific community pivoted from theoretical planning to active defense when a newly discovered asteroid posed a genuine threat to Earth.

The video chronicles the rapid mobilization of a global planetary defense system. Rather than a scheduled drill, this was a high-stakes race involving international partners and scientists worldwide to track the asteroid's orbit and calculate impact probabilities in real time.

By coordinating observations and data analysis, the team worked to understand the object's trajectory until it could be officially retired from the risk list. It serves as a primary case study on how humanity prepares for celestial threats.

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