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词汇 main-sequence turn-off
释义

Definition of main-sequence turn-off in English:

main-sequence turn-off

noun
Astronomy

  • (More fully "main-sequence turn-off point") the point on a Hertzsprung–Russell diagram beyond which all brighter stars have left the main sequence and have started to evolve into giants.

Origin

1960s.

Definition of main-sequence turn-off in US English:

main-sequence turn-off

noun
Astronomy

  • (More fully "main-sequence turn-off point") the point on a Hertzsprung–Russell diagram beyond which all brighter stars have left the main sequence and have started to evolve into giants.

Origin

1960s.
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