Total lunar eclipse
This evening I have been putting my binoculars to use to view the total lunar eclipse. During “totality” the Moon appeared reddish in colour. Beautiful.
If the Earth had no atmosphere the Moon would become invisible when it fully entered the Earth’s shadow. However, light refracted and scattered through the atmosphere can still illuminate the Moon, though with far reduced brightness. If the Earth were viewed from the surface of the Moon during a total lunar eclipse, then a black disc surrounded by a bright red ring would be seen. It is the light from this ring that we see reflected by the Moon’s surface – hence it appears a coppery red.
Where the total lunar eclipse was visible (Image: BBC)