A galaxy is a massive, gravitationally bound system consisting of stars, stellar remnants, and interstellar medium of gas and dust, and, it is hypothesized, an important but poorly understood component called dark matter. The word galaxy is derived from the Greek galaxias (γαλαξίας), literally "milky", a reference to the Milky Way. Examples of galaxies range from dwarfs with as few as ten million stars to giants with a hundred trillion stars, each orbiting their galaxy's own center of mass.


   There are some types of galaxies:

  • Ellipticals (the oldest galaxies),

  • Spirals,

  • Peculiars,

  • Rings,

  • Lenticular

  • Dwarf galaxies.

Credit Image: Emil Ivanov

  • M31
  • M51
  • M57-IC1932
  • M77
  • M82
  • NGC891
  • NGC2403
  • NGC3628
  • NGC4038-9
  • NGC4435-8
  • NGC4631-4656
  • NGC5981-2-5
M311 M512 M57-IC19323 M774 M825 NGC8916 NGC24037 NGC36288 NGC4038-99 NGC4435-810 NGC4631-465611 NGC5981-2-512