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• Orbital mechanics
  ...tory]]. This trajectory is the fastest trajectory possible that is minimum energy (based on the [[two body problem]]). Less energetic trajectories are availa *[http://www.newmars.com/forums/viewtopic.php?t=2410 Zero energy trajectories - a thread to discuss this topic] First post, Thu Mar 25, 2004
  2 KB (252 words) - 04:02, 21 January 2009
• Pegasus
  ...cket is air launched from a jet aircraft, giving it considerable potential energy of position and some drag advantage. The Pegasus rocket is also winged (si
  768 bytes (110 words) - 04:02, 21 January 2009
• Pure electric propulsion
  ...high [[specific impulse]] while pure electric propulsion implies a greater energy efficiency for a given specific impulse as a consequence of reduced entropy
  721 bytes (115 words) - 04:02, 21 January 2009
• Radioisotope thermoelectric generator
  ...hermoelectric device that converts thermal energy directly into electrical energy using the Seebeck effect. It is made of two kinds of metal (or semiconducto ...plunging into the Tonga trench in the Pacific Ocean. The US Department of Energy has conducted seawater tests and determined that the graphite casing, which
  10 KB (1,596 words) - 04:43, 24 August 2010
• Requirements for living in low temperature
  ...ure. Inhabited structures must be heated. Good insulation helps conserve energy.
  797 bytes (110 words) - 04:02, 21 January 2009
• Rockoon
  ...consequent [[atmospheric drag|drag]]), and provides considerable potential energy of position to the rocket. Thus, rockoons require less [[delta v]], making
  689 bytes (105 words) - 04:02, 21 January 2009
• Scram jet
  ...al velocity]] as opposed to [[orbital altitude]]. Thus the majority of the energy will be given to the rocket through scram jet propulsion and not other prop ...e/04_TC_Highlights/aiaa-abp.pdf Air-breathing propulsion], PROPULSION AND ENERGY<br>
  3 KB (551 words) - 04:02, 21 January 2009
• Solar electric
  ...s that solar panels would be too massive, and would increase the necessary energy expenditure. ost discussions at newmars focus on nuclear powered electric
  826 bytes (123 words) - 04:02, 21 January 2009
• Solar panels
  ...Shaped_Fixed_Array.jpg|thumb|A Solar Panel Array Shaped to Catch the Most Energy During the Day]] ...sunlight per day, a heliostatic array could produce 28.8 MJ of electrical energy per day, or an average of about 330 W over a 24 hour day. Thus, a 1kW heli
  14 KB (2,351 words) - 04:02, 21 January 2009
• Solid core
  [[Category:Energy Sources]]
  2 KB (293 words) - 04:02, 21 January 2009
• Space Terminology and Acronyms
  ...ount of energy stored in a quantity of matter, sometimes refered to as its energy density, typicaly measured in MJ/kg ; [[Specific Power]] : The amount of energy a propellant continually produces per unit of mass, measured in W/Kg or kW/
  2 KB (294 words) - 04:02, 21 January 2009
• Specific heat and heat capacity
  Specific heat is a measure of how much thernal energy is required for one unit of mass of a substance in order to change its temp The heat capacity of a mass is a measure of how much thermal energy a mass can release (or absorb) by a change of one unit temperature. If the
  4 KB (638 words) - 04:02, 21 January 2009
• Specific impulse
  | Hydrogen + Thermal Energy || 800-1000
  2 KB (295 words) - 04:02, 21 January 2009
• The Fundamentals of space Travel
  ...problem of any form of electric propulsions. Electric propulsion trades [[energy efficiency]] for [[fuel efficiency]]. A more fundamental problem then produ
  10 KB (1,764 words) - 04:02, 21 January 2009
• Thermodynamic cycle
  ...es and return to the same state. They are used as a means to transfer heat energy into work. Some common thermodynamic cycles are the [[Carnot Cycle]], the [ ...sure difference into mechanical energy, which is converted into electrical energy via a generator. The pressure difference can be created by obstructing a fl
  4 KB (711 words) - 04:02, 21 January 2009
• Three body patched trajectories
  ...spacecrafts can travel along these manifolds with a minimal expenditure of energy. Some have compared these manifolds to highways and attached the word [[int
  806 bytes (124 words) - 04:02, 21 January 2009
• Water electrolysis
  ...d atoms from recombining, plus an additional 0.47V to overcome the binding energy of the water molecules. This is 1.70V. Electrical resistance makes it worth ...MJ. In a pure electrolysis system with 70% efficiency, this is the minimum energy that the power plant must produce per person every day for the crew to brea
  2 KB (344 words) - 04:02, 21 January 2009
• Hab Consumable Masses in Mars Direct
  ...tain significant amounts of fats and proteins which have a higher specific energy, .5 kg/person per day for totally dehydrated food is theoretically possible
  5 KB (804 words) - 13:04, 23 March 2010

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