To continue John's last - though the earth 'uses' no energy in circling the sun at 60K or so, it 'has' energy in doing so, and it 'received' that energy at some point in the past. Exactly when and how it received the energy is a topic of phylosophical debate (best avoided here).
Thinking about superconductors for a moment, WFO also mentioned the concept of absolute zero. What we measure as heat energy is nothing more than greater of lesser degrees of atomic and/or molecular vibration (or oscillation). If we apply more heat, the molecules vibrate more violently. Consequently, by their vibrating, they occupy more space, or appear larger than they really are. This vibration has the effect of reducing the available space between atoms or molecules, and the more heat applied, the less effective space there is available, and collisions (physical resistance) are greater in number.
Absolute zero is the point at which the molecular movement or vibration stops. The atoms and molecules occupy a space commensurate with their real (rest) size, maximizing the available space between atoms. Electrons are free to move about with absolute minimal interference. I can't recall an exact value for absolute value, I think it's a few hundred degrees below zero (-350 or so?). Could be way wrong on that.
Radar
