Remove 4 letters from this seq...
Remove 4 letters from this sequence (PRQESEIARCHE) to reveal a familiar English word.Correct answers: 36
The first user who solved this task is Djordje Timotijevic.
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Ejnar HertzsprungBorn 8 Oct 1873; died 21 Oct 1967 at age 94. Danish astronomer who classified types of stars by relating their surface temperature (or colour) to their absolute brightness. A few years later Henry Russell illustrated this relationship graphically in what is now known as the Hertzsprung-Russell diagram, which has become fundamental to the study of stellar evolution. In 1913 he established the luminosity scale of Cepheid variable stars. |