Which wavelength of radiation do astronomers use to find the hottest stars?

天文学者は紫外線（UV）放射を使用して、最もホットな星を見つけます。 UV放射は、可視光よりも短いがX線放射よりも長い波長を持つ電磁放射の一種です。 The hottest stars emit a significant amount of UV radiation because their surface temperatures are extremely high. By observing the UV radiation emitted by stars, astronomers can estimate their temperatures and identify the hottest ones.