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This comic is about the fact that much of the way we see the world is relative. Which way is left or right, for example, depends on the direction one is facing, so different people can give different answers and both be correct. (Contrast this to absolute directions, such as East and West, which do not change based on one's orientation.)
 
This comic is about the fact that much of the way we see the world is relative. Which way is left or right, for example, depends on the direction one is facing, so different people can give different answers and both be correct. (Contrast this to absolute directions, such as East and West, which do not change based on one's orientation.)
  
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Which way is 'down' is a little more complicated, as both the absolute and relative direction use the same word (owing to the two directions usually being the same on Earth): it can be defined as 'whichever way gravity goes / the direction things fall', but it can also be defined as 'the direction one's feet are'. In space particularly, the latter definition tends to be used as the former is rather hard to deduce. It is possible, though not too useful, to simply say that 'down' in space is 'whichever way Earth is', or perhaps even 'whichever way is opposite to the Sun'.
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Which way is 'down' is a little more complicated, as both the absolute and relative direction use the same word (owing to the two directions usually being the same on Earth): it can be defined as 'whichever way gravity goes / the direction things fall', but it can also be defined as 'the direction one's feet is'. In space particularly, the latter definition tends to be used as the former is rather hard to deduce. It is possible, though not too useful, to simply say that 'down' in space is 'whichever way Earth is', or perhaps even 'whichever way is opposite to the Sun'.
  
 
However, even on Earth, the direction of 'down' can get muddled. Humans rely a lot on vision to determine which way is down, so in an enclosed room with no references, one can easily convince themselves (accidentally or deliberately) that down is in a different direction to gravity. Forcing yourself to think in a different perspective changes a lot of things that are usually thought of as mundanities.
 
However, even on Earth, the direction of 'down' can get muddled. Humans rely a lot on vision to determine which way is down, so in an enclosed room with no references, one can easily convince themselves (accidentally or deliberately) that down is in a different direction to gravity. Forcing yourself to think in a different perspective changes a lot of things that are usually thought of as mundanities.

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