>>> Black Hole <<<

• water_rat

  19 Oct 05, 12:46

  
  
  Gravitational collapse
  
  Try to jump so high that you fly right off of the Earth into outer space. What happens? Why don't you get very far? The gravitational force pulls you back down again very quickly. You could jump much higher on Mars, still higher on the moon, because they're both less massive than the Earth. The strength of gravity at the surface of the moon is only 1/6 the strength of gravity at the surface of the Earth.
  
  http://superstringtheory.com/blackh/blackh1.html
• thinkdifferent

  19 Oct 05, 21:17

  Originally posted by water_rat:

  
  
  Gravitational collapse
  
  Try to jump so high that you fly right off of the Earth into outer space. What happens? Why don't you get very far? The gravitational force pulls you back down again very quickly. You could jump much higher on Mars, still higher on the moon, because they're both less massive than the Earth. The strength of gravity at the surface of the moon is only 1/6 the strength of gravity at the surface of the Earth.
  
  http://superstringtheory.com/blackh/blackh1.html

  What happens? You suffocate as there is vacuum.
  You need to reach certain speed to leave the earth, then the orbit of the earth and then our galaxy. Those are the 3 grades of speed you need to achieve.
• numby

  20 Oct 05, 22:19

  light speed...