So if a planet that was exactly the radius of Earth...

Space/Science » in reply to What a planet is made of should not affect its mass,

FrankC — 3/13/2014 5:11:39 PM (archived)

consisted of porous rock, gravity would not be affected?

If they can calculate accurate mass by Doppler shift, I am totally confused by what I have read on the exo-planet sites I read.

Maybe I can find an example.

The whole thread (9 posts)

Kepler 62f - FrankC - 3/12/2014 8:06:25 AM
- The third way -- an extrasolar search primer. - ER - 3/13/2014 11:52:54 PM
- g @ m/r**2 - ER - 3/12/2014 10:44:57 AM
  - PS - ER - 3/12/2014 5:33:31 PM
    - If you Google the exo-planets... - FrankC - 3/13/2014 4:37:19 AM
      - What a planet is made of should not affect its mass, - ER - 3/13/2014 1:04:38 PM
        
        So if a planet that was exactly the radius of Earth... - FrankC - 3/13/2014 5:11:39 PM
        
        Gravity would be affected. - ER - 3/13/2014 7:38:50 PM
    - PPS - " would the radius always be an indicator" - ER - 3/13/2014 2:08:12 AM

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