On Jan. 13, 2021, NASA’s Solar Dynamics Observatory, or SDO, experienced its first lunar transit of the year when the moon crossed its view of the sun. The transit lasted about 30 minutes, between 12:56 and 1:25 a.m. ET. During this time, the moon happened to cover two of the spacecraft’s fine-guidance sensors, causing its view of the sun to jitter slightly. SDO recovered a steady view shortly after the transit.
![](https://scx1.b-cdn.net/csz/news/tmb/2021/nasassdospot.gif)
Source:
https://phys.org/news/2021-01-nasa-sdo-lunar-transit.html