Both the Earth and the Moon have been recorded crossing in front of the Sun on September 1, in a curious phenomenon only possible from space, thanks to NASA's Solar Dynamics Observatory (SDO).
The result was a simultaneous eclipse visible from southern Africa. The eclipse was known as a ring of fire, or annular eclipse, which is similar to a total solar eclipse, except that it occurs when the Moon is in an orbit point farther from Earth than the average. You can see it below.
In the SDO data, it can be said that the shadows of the Earth and the Moon differ by their edges: that of the Earth is diffuse, while that of the Moon is precise and defined. This is because the Earth's atmosphere absorbs some of the sunlight, creating a poorly defined edge. On the other hand, the Moon has no atmosphere, producing a clear horizon.
NASA's Solar Dynamics Observatory (SDO) maintains constant vigilance over the Sun, but during the semi-annual eclipse seasons, the Earth briefly blocks the line of sight of the space observatory every day, a consequence of the SDO's geosynchronous orbit.
NASA launched the mission Solar Dynamics Observatory with the objective of studying solar variability and the impact on Earth. One of the most important instruments for this mission is the Atmospheric Imaging Assembly (AIA), which uses four telescopes simultaneously to take 8 photographs of the Sun every 12 seconds. There are also two other instruments, along with which the information reaches 1.5 terabytes per day.