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...mentally compare with other distances in the Solar System!). In all sciences it is extremely important to state the units of any quantity. This is particularly true in astronomy, where the numbers can be very different if expressed in everyday units...Week 2: Planets, large and small: 3 Gas giants and ice giants - The outer regions of the four giant planets in the Solar...

...mental disorders: the word ‘lunacy’ is derived from ‘lunar’. This is reflected in popular culture – for example, the character Luna Lovegood in the Harry Potter books. Another rich area of cultural references to the Moon comes from the story of a simpleton trying to recover a large cheese, really a reflection of the Moon, from a lake. The story is present in the...