no they cant
no they cant
size, color, distance and shape
The five main groups of stars are main sequence stars, giant stars, supergiant stars, white dwarf stars, and neutron stars. These groups are classified based on their size, temperature, and stage in their life cycle.
Stars are classified by size using the Hertzsprung-Russell diagram, which categorizes them based on luminosity and temperature. Stars are sorted into main sequence, giant, supergiant, or dwarf categories. Temperature determines a star's color, with hotter stars appearing blue-white and cooler stars appearing red.
I don't know if this is THE four ways, but here are four possible ways:Temperature/Color (amounts to the same thing)SizePopulation ("metallicity" is essentially a different description of pretty much the same thing)Mass
Stars can be classified based on their size, temperature, and color. Common types include main sequence stars like the Sun, giant stars, and supergiant stars. Other types include white dwarfs, neutron stars, and black holes.
There is no real classification for stars by size, they are usually classified by luminosity However, a rough guide is:-HypergiantsSupergiantsBright GiantsGiantsSub giantsDwarfsSub dwarfsRed dwarfsWhite dwarfsBrown dwarfsNeutron starsSee related link for a spectral class breakdown and examples
Main Sequence
They are classified as Main Sequence Stars, of which differ in color, size, brightness, and heat. The smallest stars are usually a blueish color and are the hottest, and the largest stars range from yellow to dark red (those being the very biggest). I hope this answered your question. Have a nice day!
By spectral type: Stars can be classified based on their spectral characteristics, which provides information about their temperature, color, and composition. By luminosity: Stars can be categorized by their brightness, which can vary greatly based on their size and energy output. By evolutionary stage: Stars can be classified based on where they are in their life cycle, such as main sequence stars, red giants, white dwarfs, etc.
altitude
Stars can be classified based on their temperature, which is often indicated by their color, ranging from blue (hot) to red (cool). Additionally, they can be categorized by their luminosity or brightness, which is influenced by both their size and temperature. This classification helps astronomers understand the life cycle and characteristics of different types of stars.