Finally, we let the orbit pass around the lamp and measure the light intensity as a function of time. Whenever the orbit passes in front of the lamp, the brightness goes down a little, but does not become zero: a very good analogy to the planetary transit.
![](https://exopla.net/wp-content/uploads/2020/01/eisenbahn_aufbau1_600dpi-1-1024x411.jpg)
![](https://exopla.net/wp-content/uploads/2020/01/lok_silhouette.jpg)
(in the meantime, the plate is laked black and the lamp is better)