Planetary Definition and 306 Threads

  1. S

    Exploring the Mysteries of Planetary Rings: Formation, Movement, and Theories

    how do planetary rings form? how do they move? what are some theories?
  2. O

    How Effective is the Planetary Config Spreadsheet for Astronomical Calculations?

    I finished the Planetary Config Spreadsheet I have been working on during my down time at work. Well, finished the first version of it, anyway. I managed to do it all with no VBScript, so you don't have to worry about macro viruses. If you are interested and you have some time, I would...
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    Does the Earth's Core Wobble Within the Planet Due to the Moon's Orbit?

    "Wobble" of Planetary Core Friend of mine was asking about the Earth-Moon system, and he brought up an interesting question. As the Moon orbits the Earth, it imparts a slight wobble to the planet, much like the wobble used to infer the presence of planets aroubd distant stars. So he was...
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    Planetary Magnetic Feild Inversion

    OK, I realize this may be more geophysics then "geology", but I beg for leniency. I have recently been exchanging e-mails with Dr. Daniel Lathrop of the University of Maryland. He is currently involved in a project attempting to model the Earth's magnetic field and, in particular, polar...
  5. M

    A question of Planetary formation.

    My question pertains to atmosphere. Forgive me if it sounds stupid, or obvious, but I just don't know how atmospheres come about. I understand how planetoids and planets are formed, but when/how does it get an atmosphere? Any help would be appreciated.
  6. D

    Early planetary formation thought

    Greetings ! Some less popular theories, at this time, suggest that planets formed or at least began to form before the Sun had formed. I'm not sure that I agree with that, but it's worth remembering as another counter example to the idea I just thought about. Anyway, the idea I just...
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