What are variable stars?
Variable stars are stars whose brightness changes over time due to various factors, including pulsation, eruptions, or eclipses.
What causes these brightness changes?
Brightness changes can be caused by intrinsic factors like pulsations in the star itself or extrinsic factors like another star eclipsing it.
Can you give examples of different types of variable stars?
Sure! Some examples include Cepheid variables, which pulsate regularly, and eclipsing binaries, where two stars orbit each other.
How do astronomers measure the brightness of these stars?
Astronomers use photometry, which involves measuring the light intensity from stars over time to track their brightness changes.
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