Uploaded January 2026 | Updated September 2026, 2 weeks ago

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n 2029, asteroid Apophis will pass closer to Earth than many satellites — a once-in-a-lifetime planetary encounter.

When Apophis was first discovered in 2004, early orbital calculations revealed something unexpected: a tiny region of space known as a gravitational keyhole. If the asteroid had passed through that narrow zone during its 2029 flyby, Earth’s gravity could have altered its orbit toward a future impact.

It won’t — and scientists now know that with high confidence.

But the story of why this mattered, how the risk briefly rose and fell, and how planetary defense actually works is rarely explained clearly.

This video breaks down:

How Apophis was discovered and tracked

What a gravitational keyhole really is (and what it is not)

Why early impact probabilities changed so quickly

How scientists ruled out future impact scenarios

What this event teaches us about real planetary defense

This isn’t fear.
This is science in motion.