[meteorite-list] (OT) Habital Planet Discovery Announcement

[Chris Peterson]

Surface gravity compared with Earth can be approximated as m/r^2, where m is 
in Earth masses and r is in Earth radii. If this new planet is only three 
Earth masses and is 1.4 Earth radii, its surface gravity will be 1.5g. If 
the planet is four Earth masses and 1.2 Earth radii, its surface gravity 
will be 2.8g. 2g would seem to be a reasonable mid-range value if we take 
intermediate values for size and mass.

Chris

*****************************************
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com


----- Original Message ----- 
From: "Carl 's" <carloselguapo1 at hotmail.com>
To: <meteorite-list at meteoritecentral.com>
Sent: Wednesday, September 29, 2010 6:46 PM
Subject: Re: [meteorite-list] (OT) Habital Planet Discovery Announcement


>
> Good evening All,
>
> Sorry for being really dense about stuff like this but I don't quite 
> understand how a planet with a mass three to four times and a diameter 1.2 
> to 1.4 times Earth will only have it's gravity only slightly higher? How 
> much is "slightly"? Thanks for the link, Count.
>
> Carl2