Don't Panic Geocast

Episode 7 - "We don't have ancient Greeks on other planets"

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This week we talk about how sciences can weight a planet, discuss gravity, and the explosion of a military weather satellite while in orbit.

Weather Satellite Explodes

Ways to Measure Planetary Mass

  • Geometric (size and density), this doesn’t always work well
  • By triangulation and measurement of orbits of natural or artificial satellites.

    • Gravity

    • All stems from Newton’s Law of Gravitation. Which is really a controversy between Newton and Hooke.
    • Gravitational constant based on the Cavendish torsion balance experiment.
    • Measurement of the constant is difficult since it is small and we cannot measure outside of a gravitational field.
    • With this and Kepler’s Laws, we can solve most simple problems by hand!

      • Planetary Ranging

      A variety of ranging techniques can be used, including:

      • Radio reflection
      • Laser reflection
      • Triangulation

        • Fun Paper Friday

        THE ASTEROID REDIRECT MISSION AND SUSTAINABLE HUMAN EXPLORATION, Gates et al.

        This week we talk about capturing an asteroid with a bag and a pull string, or a spider like lander. The asteroid is then explored and moved into a lunar-like orbit for further study. The best part of all is that the ship will have an international docking system so anyone can go do science. A step towards open source science!

        Contact us:

        Show - www.dontpanicgeocast.com - @dontpanicgeo - [email protected]

        John Leeman - www.johnrleeman.com - @geo_leeman

        Shannon Dulin - @ShannonDulin

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        Don't Panic GeocastBy John Leeman and Shannon Dulin
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