Answers created by Fletcher

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• Why was the atmosphere of the Earth formed?
  
• What is stellar parallax and how is it used to determine the distance to stars?
  
• How do astronomers know how big the universe is?
  
• How massive is the universe?
  
• What generates weather and climate patterns on Earth?
  
• Which type of current involves charge flow in a single direction?
  
• Why is the site called Socratic?
  
• How was Saturn formed?
  
• How does the galaxy move?
  
• Why is Hubble's constant uncertain?
  
• Why does stress eventually exhaust people?
  
• Approximatly, how many nebulae are there in the universe?
  
• How far is the nearest galaxy to the milky way?
  
• How many kilometers is the universe across?
  
• How do astronomers take pictures of the universe?
  
• What is parallax mapping?
  
• What is the biggest difference between Mars' northern and southern hemispheres?
  
• What’s the difference between a main sequence star and a neutron star?
  
• If a black hole swallows the earth, would we still be pulled by earth's gravity or would we be pulled by the black hole's gravity?
  
• Are the ergosphere and accretion disk the same thing?
  
• What is the life cycle of the Vega star?
  
• What is a red giant star?
  
• How are pictures of the galaxy taken?
  
• How are spiral galaxies formed?
  
• What happens to a galaxy when a black hole is formed within it?
  
• How do the birth and death of stars occur? Are they rare happenings?
  
• What is on the other side of a black hole? Can it take you somewhere?
  
• How are massive stars born?
  
• How long will earth's core stay molten?
  
• How do you calculate the size of the observable universe?
  
• Some people say that it is possible for a blackwhole to evaporate, if so then where does all the matter that fell into it go?
  
• How many new stars are born per second in the visible universe?