Atomb has recently been unearthed in egypt that shows a set of wall paintings and hieroglyphics of stars falling to and rising above the horizon over the course of the year. (in egyptian mythology, these stars served as sentinels for the pharaoh’s passage through the underworld.) how would astronomers use this data to date the tomb? what are the most common nearby stars and why are they not visible to the naked eye? how is chromatic aberration related to a prism spectrograph? if the sun has a temperature of 5800 k, of what colour is the peak of its light? if the temperature were doubled, where is the new peak of emission? what is the luminosity of the hotter sun relative to the original sun? name three ways in which the models of ptolemy and copernicus are similar to each other. what direct observational evidence leads us to believe that the activity at the surface of the sun is due to magnetic fields rather than nuclear fusion?