For comparison, a planet at 5.4 AU separation (5.4 times the Earth - Sun separation or 1 times the Sun - Jupiter separation) will appear 5.4 / 10 = 0.54 arc second from its host star, the equivalent of the apparent size of a penny seen from about 5 miles. (distantearths.com)
The sequence goes like this: Get some copper sample plates, each about the size of a penny. (discovermagazine.com)
A new stingray bot about the size of a penny relies on light - sensitive heart cells to swim. (sciencenews.org)