Earth 4.0 / 5 based on 1 rating ? AstronomyGCSEAll boards Created by: maddyCreated on: 27-04-13 17:35 What shape is the Earth Squashed sphere 1 of 5 Who was the first person to make an accurate calculation of the circumference of the Earth? Eratosthenes of Cyrene 2 of 5 How long does it take for the Earth to rotate on a sidereal day? 23 hours 56 minutes 3 of 5 What does sidereal mean? Star 4 of 5 The trails stars leave behind are what? Arcs of circles 5 of 5
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