Physics and Astronomy
Mathematics and Natural Sciences
In most disciplines, finding the distance from one object to the next is, at least in theory, a simple operation. Not so in astronomy. While the size of Earth itself was determined with a fair degree of accuracy in ancient times, the scale of the solar system wasn’t fully understood until just a few centuries ago, and the distances to even the closest of stars wasn’t reliably determined until Friedrich Bessel measured the distance to 61 Cygni in 1838.
The Physics Teacher
(2017). Depth Perception. The Physics Teacher, 55, 78-79.
Available at: https://aquila.usm.edu/fac_pubs/15857