The Sun
What process creates the suns energy?
Nuclear Fusion
Why is the cosmic microwave background evidence for the big bang?
Large amounts of energy was released in all directions and is now detected as microwave radiation all over the universe.
True or False: Red Giants have a longer lifespan than main sequence stars
How does a stars mass affect its lifetime?
The more massive the star the shorter the lifetime
What does hydrogen turn into during nuclear fusion?
Helium
What has happened to the wavelengths of stellar radiation since the first stars formed?
They have gotten longer
What does Helium turn into during nuclear fusion of giant stars?
Carbon
How long does it take for Oxygen to turn into Sillica
6 months
What factors influence nuclear reactions in stars? (there are two)
Mass of star and stage in lifetime
What type of shift do astronomers see when galaxies are moving further away from earth?
Redshift
What is the last stage of a red giant star?
White dwarf
What type of star will our sun eventually turn into?
Red Giant
Every 11 years
What is a redshift, and longer wavelengths in stellar radiation evidence for?
Expansion
How does the temperature of red giants compare to the temperature of our sun? (are red giants hotter, or colder)
Red Giants are cooler
The andromeda galaxy is a rare case because it is traveling towards earth, instead of away from earth, what type of shift is this?
Blueshift
How does the suns energy travel to earth? (what type of radation)
Electromagnetic Radiation
As distance from the earth increases, what else increases?
Recessional Velocity
Where does nuclear fusion occur?
The core
The big bang theory provides evidence that the universe is constantly _____________.
Expanding