US5=EU35=UK4=22.5CM US5.5=EU36=UK4.5=23CM US6=EU37=UK5=23.5CM US6.5=EU38=UK5.5=24CM US7=EU39=UK6=24.5CM US7.5=EU40=UK6.5=25CM US8=EU41=UK7=25.5CM US8.5=EU42=UK7.5=26CM US9=EU43=UK8=26.5CM US10=EU44=UK9=27CM US11=EU45=UK10=27.5CM US12=EU46=UK11=28CM US13=EU47=UK12=28.5CM
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An organically grown planet definition
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Explorer 1: The start of the American Space Age
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New pulsar result supports particle dark matter

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An organically grown planet definitionIn an Astronomy magazine exclusive, planetary scientists Kirby Runyon and Alan Stern ask an important question: Should we really define a word by voting? Read more >>>