+The [HR Diagram](/wiki/HR_Diagram) charts the [luminosity](/wiki/Luminosity) of [stars](/wiki/Star) against their surface temperature or spectral type. This fundamental tool in astrophysics reveals key insights into stellar evolution and life cycles.
+## See also
+- [Stellar Evolution](/wiki/Stellar_Evolution)
+- [Main Sequence](/wiki/Main_Sequence)
+- [White Dwarf](/wiki/White_Dwarf)
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