The Mudcat Café TM
Thread #119991 Message #2606673
Posted By: GUEST,TIA
07-Apr-09 - 02:05 PM
Thread Name: BS: Gravity, meters and physics made easy
Subject: RE: BS: Gravity, meters and physics made easy
Careful! The gravitational constant is in fact constant. The strength of the Earth's field does vary from place to place and certainly with altitude.
The constant (big G) = 6.67428 +/- 0.00067 x 10^-11 m^3/kg s^2 The Earth's field strength (little g) can vary a lot (well, okay, by about 0.008 percent), but quite measurable.
JPL's GRACE map of Earth's gravity variations is here: