Why does the existence of the cosmic redshift lead to the big bang picture of the universe?

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  • What is a particle accelerator?
    1. How do scientists use particle accelerators to study subatomic particles?
  • What particle is exchanged to generate each of the four fundamental forces?
  • What medical technologies (e.g. PET) rely on the physics of elementary particles?What are the benefits of noninvasive procedures such as PET?
  • How is astronomy the oldest science?
  • How does the energy produced at the core of the Sun reach the photosphere?
  • Why won’t the Sun become a supernova or black hole?
  • Why does the existence of the cosmic redshift lead to the big bang picture of the universe?
  • If a galaxy is 1,000 Mpc away, how fast is it receding from us?
  • The average temperature of the universe is 2.7 Kelvin. What is that temperature in degrees Fahrenheit?
  • The Milky Way has a radius of approximately 100,000 light years. How many miles is that? How long would it take you to travel across our galaxy if you were traveling at 50% the speed of light (be sure to show your work for full credit)?