Historic astronomical measurements, continued: solar deflection of starlight.

## Monday, July 20, 2015

## Friday, July 17, 2015

Some historic astronomical measurements:

- Start with the distance between two cities.
- Use (1) to estimate Earth's radius.
- Use (2) to estimate Earth's orbital radius.
- Use (3) to estimate the speed of light.
- Use (3) to estimate distances to stars.