Final answer:
The properties that can classify a star include spectral class, luminosity, mass, size, and age.
Step-by-step explanation:
- Spectral Class: Stars are classified based on their spectral class, which is determined by their surface temperature. The spectral classes, from hottest to coldest, are O, B, A, F, G, K, and M.
- Luminosity: Stars have different brightness levels, known as luminosity. This property can help classify stars into different luminosity classes.
- Mass: The mass of a star is an important property that can classify it. Stars can have varying masses, from low-mass stars to high-mass stars.
- Size: Stars come in different sizes, ranging from small dwarf stars to giant stars. The size of a star can be used as a classification property.
- Age: The age of a star is another property that can classify it. Stars go through different stages of evolution, and their age can be determined based on their characteristics, such as luminosity and temperature.