How the Space Program Protects Earth From Asteroids @BobtheScienceGuy

Uploaded January 2026 | Updated September 2026, 3 weeks ago

How the Space Program Protects Earth From Asteroids

Bob the Science Guy uses astronomy, mission data, geometry and repeatable observations to test what the model predicts. The goal is to connect the claim with evidence that can be checked independently.

Bob the Science Guy — Science You Can Test
Measure it. Observe it. Test it. Understand it.
sites.google.com/view/bobthescienceguy

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$Four Independent Ways to Measure Earth’s Radius Earth’s radius can be checked with independent methods that rely on different observations. This video compares Eratosthenes shadow geometry, Al-Biruni’s horizon-dip method, hidden-height measurements with refraction corrections, and great-circle distances calculated with the Haversine formula, showing that the results converge on the same physical scale.$

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How the Space Program Protects Earth From Asteroids