The Milky Way
What causes the sun to shine?
What is nuclear fusion?
What scale is the Hertzsprung-Russell Diagram?
What is surface temperature (Kelvin)?
Developed the Hertzsprung – Russell diagram and LS coupling
Who is Henry Norris Russell?
Momentum
What is mass x velocity?
What do clouds of gas and dust do in the Milky Way?
What is block visible light?
Surface temperature axis on H-R diagram
What is the x-axis?
Found that stars could be classified according to their temperatures
Who is Cecilia Payne-Gaposchkin?
What is needed to find a star's luminosity?
What are apparent brightness and distance?
Core temperature of the sun
15 million K
Hot, massive stars =
What is active star formation?
She worked with galaxy rotation rates
Who is Vera Rubin?
How to find the distance to nearby stars?
What is parallax?
What is at the center of our galaxy?
What is a super-massive black hole?
Quasar temperature
What is a wide range?
Discover the relationship between luminosity and the period of cepheid variables.
Who is Henrietta Swan Leavitt?
Energy = 𝜎T4
Stefan-Boltzman Law
Sunspots, solar flares, and solar prominences have this in common
What is a magnetic field?
Y-axis on an H-R diagram
What is luminosity?
Proved that many objects that were classified as dust clouds were actually galaxies past the Milky Way
Who is Edwin Hubble?
Luminosity equation
4𝜋R2𝜎T4