What temperature range defines the O spectral type for stars?

Answer

Exceeding 30,000 Kelvin

O-type stars represent the hottest category in the Harvard spectral classification system. They possess surface temperatures exceeding 30,000 Kelvin and appear blue. This high temperature aligns with the principle that hotter objects emit light at shorter, higher-energy wavelengths.

What temperature range defines the O spectral type for stars?

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