What colors represent the coolest stars visible through observation, terminating the sequence at the bottom?
Answer
Orange and deep Red
The thermal ladder of stellar colors culminates at the coolest observable temperatures with shades of orange and deep red. Red stars possess the lowest surface temperatures among those stars that still produce visible light. These cool, dim giants exist at the far end of the progression, directly opposite the searingly hot blue stars. While these colors still represent immense heat compared to everyday objects on Earth, they mark the lowest point in the sequence representing visible spectral output, corresponding to M-type spectral classes which hover around 2,500 to 3,000 K.
Related Questions
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