Star

• Star


  • A natural luminous body visible in the sky especially night. at • A huge sphere of very hot glowing gas
• A large star shines brighter than a small star.
• A hot star shines brighter than a cool star.
• apparent brightness 


  is the brightness you see from Earth.
• absolute brightness 


  is the brightness the star would have if all stars were the same distance from Earth.
• Blue


  Color of the star that is the hottest
• Red

  Color of the star that is coolest
• nebula


  Stars start out as diffused clouds of gas and dust drifting through space. A single one of these clouds is called a .
• Protostar 


  earliest stage of a star's life
• White dwarf 


  star left at the core of a planetary nebula
• Black dwarf


  what a medium-mass star becomes at the end of its life
• Supernova


  a red supergiant explodes
• Neutron


  the remains of a high mass star
• Black hole


  exerts such a strong gravitational pull that no light escapes