If you were standing on the Moon during a total lunar eclipse, you would witness a unique and awe-inspiring phenomenon. During a lunar eclipse, the Earth comes between the Sun and the Moon, casting a shadow on the Moon's surface.
From the Moon's perspective, during a total lunar eclipse, you would see the Earth blocking the Sun. However, instead of appearing completely black, the Earth would be surrounded by a thin, glowing ring called Earth's "atmospheric rim" or "Earth's ring of fire." This is caused by sunlight being refracted and filtered through Earth's atmosphere, which bends the light around the edges of the Earth and onto the Moon.
The exact appearance of the atmospheric rim can vary depending on the conditions in Earth's atmosphere at the time of the eclipse. It might appear as a reddish or coppery ring, due to the scattering of shorter wavelengths of light by Earth's atmosphere. The intensity and color of the rim can also be influenced by the presence of dust or pollution in Earth's atmosphere.
While the Moon is within Earth's shadow, it generally does not go completely dark. Some sunlight does manage to reach the Moon by bending around the Earth, resulting in a dim glow and sometimes even a faint reddish color across the lunar surface. This phenomenon is known as "Earthshine," where sunlight reflected by the Earth illuminates the Moon during a lunar eclipse.
Overall, the sight from the Moon during a total lunar eclipse would be a fascinating combination of Earth's atmospheric rim surrounding the darkened Earth and the dimly illuminated Moon due to Earthshine.