• Magnitude
  • Each magnitude is relevant to a two fifth percentage of its previous whole number (as relevant to Vega).
    • . -1 = 250%
    • 0 = 100%
    • 1 = 40%
• Parsecs (pc)
  • Unit of length about 3.26 light-years, or just under 31 trillion (3.1×1013) kilometres (about 19 trillion miles).
• Astronomical Unit (AU)
  • Unit of length equal to about 149,597,870.7 kilometres (92,955,807.3 mi).
  • Approx. the mean Earth-Sun distance.

The fact that my OneNote docs have died and I have to type this pisses me off.

• Conservation of Energy
  • Energy is neither created nor destroyed - it is only converted from one state to another.
• Laws of Thermodynamics
  • First Law of Thermodynamics
  • The change in the internal energy of a closed system is equal to the amount of supplied heat, minus the amount of work performed by the system on its surroundings.
  • A version of the law of Conservation specialised for thermodynamical systems.
  • Zeroth Law of Thermodynamics
  • The zeroth law states that if two systems are in thermal equilibrium with a third system, they are also in thermal equilibrium with each other.
  • Systems are said to be in thermal equilibrium if they would not transfer heat between each other (for example by conduction or radiation) whether able to do so or otherwise.
  • Second Law of Thermodynamics
  • Over time, differences in temperature, pressure, and chemical potential equilibrate in an isolated physical system so as to result in the natural entropic dissolution of the system itself.
  • A thermodynamic system cannot complete a full heat loop because a process with the sole purpose of heat transfer from a body of lower temperature to a body of higher temperature is not possible; thus resulting in entropy.
  • Third Law of Thermodynamics
  • The entropy of a perfect crystal at absolute zero is exactly equal to zero.
  • At zero kelvin the system must be in a state with the minimum possible energy, and this statement of the third law holds true if the perfect crystal has only one minimum energy state. Entropy is related to the number of possible microstates, and with only one microstate available at zero kelvin, the entropy is exactly zero.
• Energy Transfer
  • Energy transfer. The two systems will bring each other to a collectively lower-energy, stable state.