life cycles of stars

In a 2 to 3 paragraph essay, answering the following questions concerning star formation and evolution: How do stars form from the interstellar medium? What defines the main sequence stage of a star? What happens after a low mass star leaves the main sequence? What types of stellar remnants will a low mass star leave behind? What happens after a high mass star leaves the main sequence? What types of stellar remnants will a high mass star leave behind?

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