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Astronomical Resources
NASA - American Space Agency
National Geografic - Sollar System
Maps of The Solar Systems
StarGazer on line - The Night Sky on Paper
Solar System Simulator
The Constellations and their Stars
The Extrasolar Planets Encyclopaedia

  W Stele Wolf Rayet linii He He+
  O Stele albastre foarte calde linii He++ Si++++
  B Stele albastre cu heliu linii He Si+++
  A Stele albe cu hidrogen linii H metale
  F Stele albe galbene metalice linii H Ca+ metale
  G Stele galbene tip solar linii H Ca+ metale
  K Stele galbene portocalii linii Ca+ metale
  M Stele rosii cu oxid de titan benzi de absorbtie TiO
  R Stele galbene inchis carbonate benzi moleculare de CN CH CO
  N Stele rosii rubinii carbonate qnzi moleculare de carbon
  S Stele gigante benzi moleculare de oxid de Zr si Tc

Documentar milky way black hole
Site-ul oficial Star Trek
Paramount Pictures

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