Suppose that two stars are identical in every wayfor example, same distance, same mass, same temperature, same chemical composition, and same speed relative to Earthexcept that one star rotates faster than the other.
Spectroscopically, how could you tell the stars apart? A) The faster rotating star has wider spectral lines than the slower rotating star.
B) The faster rotating star will have an emission line spectrum while the slower rotating star will have an absorption line spectrum.
C) The peak of thermal emission will be at a shorter wavelength for the faster rotating star than for the slower rotating star.
D) There is no way to tell the stars apart spectroscopically, because their spectra will be identical.
Question 2
Which of the following materials present in the solar system had the highest condensation temperatures?
A) metals
B) rocks
C) hydrogen and helium gases
D) hydrogen compounds like water, methane, and ammonia
Mars's average distance from the Sun is roughly 230 million km (1.5 AU) and its orbital period
The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star
The Mass-Luminosity Relation
Mass Loss from a Supermassive Star
Post–Main-Sequence Evolution of Low-Mass Stars