why do stars have different classifications?

Answer 1

To make them easier to learn and associate with one another.

Answer 2

Here's a website that might help answer your question. There are many reasons why stars are classified the way they are. This website explains them:

http://www.enchantedlearning.com/subjects/astronomy/stars/startypes.shtml

To find out more, simply do a search on Yahoo, Google, or any of the popular engines using the key words "star classifications."

Answer 3

Because all the different stars are all in varying stages of their "lives"...bluer stars tend to be newer and hotter-- redder stars tend to be older and cooler--white and yellow stars are more middle aged. There's white dwarfs, neutron stars, and black holes, all of which are different types of remnants of stars that have died. There are some stars that are so large that they would encompass the entire solar system.

Answer 4

To understand them better~ not all stars are the same, the only thing they have in common is that they fuse atoms in consequence of gravity, and energy.

Answer 5

To account for their different sizes and spectra of light emitted