Scholarly Rants (Know your ... from a hole in the ground) 
11/08 Gravitational Potential The gravitational potential of the solar system.
12/08 Earth's Gravity Gravitational acceleration inside and outside the Earth.
01/09 Earth's Gravitational Binding Energy Where's the kaboom? There was supposed to be an Earth-shattering kaboom!
09/09 The Radio JOVE Project Observing Jupiter's radio frequency emission.
11/09 Setting up a Radio-SkyPipe Server How to do it.