Ask HN: If earth was the size of a coin, how far to the nearest star?

What kind of coin? If it was as big as a Triganic Pu, then ... about 4 light years.

Googling "coin size": Coin radius: 38.1 mm - silver dollar (Cited from: https://www.cointalk.com/threads/us-coin-relative-sizes-char...)

Googling "earth size": Earth radius: 6371 km

Googling "distance to sun in km" Distance to Sun: 149.6 million km

38.1e-4 / x = 6371e4 / 149.6e10

Doing the calculation is left as an exercise to the reader.

I calculate the earth is about 566 million £1 coins wide so everything scales down by roughly that much. So the sun would be 0.164 miles away.. and Proxima Centauri 44,063 miles away?

Isn't this just math?