Expansion of the Universe
These type of wavelengths are longer
What are Red-shift wavelengths?
What is the Sun?
This creates a nebula
What is a dying/exploding star (supernova)?
Galaxies that form a lot of stars
What are Active Galaxies?
This happens in all stars
What is Nuclear Fusion?
Doppler evidence show us that when galaxies move away their light is this
What is Red-Shifted?
Hydrogen becomes this in fusion and energy is released.
What is Helium?
Stars with the same mass will have the same
What is Life Cycle?
This formed in the first few minutes after the Big Bang
What is Simple Elements? (Hydrogen and Helium)
Final stage of the Sun
What is a White dwarf?
The Big Bang Theory
What is the current theory about the universe's formation?
The Milky Way is this type of galaxy
What is Spiral?
This shows the temperature and brightness of stars
What is the HR diagram?
This gives stars their energy
What is Nuclear Fusion?
This tells us that heavier elements were created by fusion
They are found in stars and planets?
The farther away a galaxy is, the faster it moves
What is Hubble's Law?
The Milky Way is make up of these
What are billions of stars?
The final stage of a massive star
What is a Black Hole?
Type of wave which can travel without a medium
What is a Light Wave
This keeps the Sun from collapsing
What is Thermal Pressure (pressure from fusion).
Approximate number of galaxies in the universe
What are Billions?
This makes up the majority of our universe
What are dark energy and dark matter?
Scientists heat elements to reveal these in order to study stars
What are Spectra (color lines)?
When a star or galaxy is moving toward us
What is Blue Shift?
This tells us the universe had a beginning form a hot, dense point.
What cosmic background radiation?