the mighty milky way
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The mighty milky way. Black holes. A black hole has super gravity. A black hole will arrive every 10,000 to 100,000 years. A black hole is so powerful that nothing can escape its pull ,that is why it is so dark . It can destroy stars . nebula.

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Presentation Transcript
black holes
Black holes
  • A black hole has super gravity.
  • A black hole will arrive every 10,000 to 100,000 years.
  • A black hole is so powerful that nothing can escape its pull ,that is why it is so dark .
  • It can destroy stars .
nebula
nebula
  • Inside a nebula gasses are push out , and gravity pulls inward
  • It pulls more and more dust and gas . It squeezes tighter and tighter into a big blob .
  • The blob heats up and begins to glow
  • All of that is because a star is being born .
stars
Stars
  • The blue stars are hotter and red is cooler.
  • The blue stars are hotter then the sun.
  • A blue star lives for 4.6 millions years.
  • Almost none of the stars shine yellow.
word wise
Word wise
  • Black hole: an object in space with so much gravity .
  • Galaxy: a collection of stars ,gasses & matter held together by gravity.
  • Light years : the distance light can travel a year.
  • Nebula: a cloud of gasses and dust .
  • Supernova : an explosion that destroys stars
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