🌕 The Moon During a Total Lunar Eclipse How does the Moon change during a total lunar eclipse? This 5-hour timelapse captures the full Moon as Earth’s shadow slowly moves across its surface. The circular shadow you see is our planet blocking sunlight. As the eclipse reaches totality, the Moon turns deep red — often called a “Blood Moon.” The blue tint along the shadow’s edge is connected to why Earth’s sky appears blue. The deep red color at the center happens for the same reason sunsets look r