Too Much Teaching is Wasted | Tom Sherrington

Let me give you some information: (Try to imagine that you’re going to learn it.)
The Earth-Sun distance is used as unit of distance called the Astronomical Unit. 1 AU. 
The Earth-Moon distance is 0.0026 AU to 2 significant figures. 
The nearest Star is Proxima Centauri (part of the Alpha Centauri system. Pronounced ‘Sen-TOR-eye’). The distance to Proxima Centauri is 270,000 AU to 2 significant figures. 
On a scale we can relate to, let’s say 1 AU is 1 metre. The length of a metre ruler. 
This makes the Earth-Moon distance 2.6 mm; the Earth-Sun distance, 1 metre, and Proxima Centauri…

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