Astronomy terms starting with E

12 terms

  1. Electromagnetic Force The fundamental force which binds electrons to atoms, and governs the physics of light. Any charge feels an electric force from another charge.
  2. Electromagnetic Radiation (ee-LEK-troh-mag-NEH-tik ray-dee-AY-shun) Low-energy radiation that comes from the interaction of electric and magnetic fields.
  3. Electromagnetic Spectrum The entire range of wavelengths of electromagnetic energy, including (from short to long wavelengths) gamma rays, X rays, ultraviolet light, visible…
  4. Electron A sub-atomic particle that has a negative electric charge.
  5. Elementary Particle Physics The study of fundamental particles (such as quarks and leptons) and their interactions (forces).
  6. Energetic Particles The atoms and molecules of a gas are in constant motion, colliding rapidly and filling all available space.
  7. Energy Density The amount of energy per unit volume. The energy density affects, and is affected by, the expansion or contraction of the universe.
  8. Energy Spectrum The amount of energy emitted at a specific wavelength of light. For example, the Sun emits light at many wavelengths, which can be seen by passing…
  9. Equilibrium To be in a state of perfect balance. A spinning top is a kind of equilibrium untill it falls.
  10. ERA A time period dominated by a particular physical process.
  11. Evolution Changing with time.
  12. Extrapolate To create new information based on what is already there.