However, it's becomeacommonpracticeto do just theopposite. e-commerce siteshavetaken this "scatter shot" approachoftrying toslap thepotentialbuyer with asmanyoptions as possible.
The fact that different bodies in the solar system change their relative positions as they orbit the sun will, Dr Hooke concedes, complicate routing a bit: when the earth and Mars are on opposite sides of the sun, for example, it might be best to send e-mail via Venus.