1. What are the differences between the nearest stars and the visually brightest stars on an H-R diagram?
2. If you could sample all of the stars in our Galaxy (which is simply a collection of the stars, gas, and dust which are all gravitationally bound to a common center of mass), which set do you think would best represent the relative distribution of stars in that sample (the nearest stars or the brightest stars)? Why?
3. If a star were measure to have a temperature of 3,500K, what do you predict the luminosity to most likely be by looking at an H-R diagram. Explain why you predict this luminosity
4. If you were to measure the flux of the star in the previous question to have a value equal to 5.15 x10-12 W/m2, roughly how far away would the star be in parsecs? Hint: 1 LSun = 3.86 x 1026 W, 1 pc = 3.09 x 1016 m.
5. Star A has a temperature of 3,000K and a luminosity of 0.00001 LSun. Star C is the same temperature as star A, but has a luminosity of 0.001 LSun. How much larger/smaller is it than Star A?