A light year

A light year (9.46 trillion km)



Neat Ratios ...

A light year (9.46 trillion km)

  • is 4000 x Diameter of the star UY Scuti, largest known star (2.377 billion km)...more
  • is 10000 x Length (circumference) of Earth's orbit around the Sun (940 million km)...more

If this was a standard unit ...

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Is That a Big Number? - the book - is now available from all good booksellers.

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