What is a variable star?
Q: What is a variable star?
A: A variable star is a star that can change its brightness.
Q: How do most stars behave in terms of brightness?
A: Most stars have very small differences in brightness, similar to the Sun.
Q: Are there different types of variable stars?
A: Yes, there are generally two types of variable stars.
Q: What are the two types of variable stars?
A: The two types of variable stars are not specified in the given text.
Q: How does a variable star differ from a non-variable star?
A: A variable star is different from a non-variable star because its brightness can sometimes change.
Q: How do astronomers study variable stars?
A: Astronomers study variable stars by observing changes in their brightness over time.
Q: Why is the study of variable stars important in astronomy?
A: The study of variable stars is important in astronomy because it can reveal information about the internal workings of stars and the universe as a whole.
