his composite shows the progression of a recent total lunar eclipse as Earth’s shadow slowly moved across the full Moon. Beginning at left, the Moon enters the dark inner shadow of Earth (the umbra), gradually dimming until totality occurs near the center of the sequence, when the Moon glows a deep copper-red. The curved edge of Earth’s shadow reveals the round shape of our planet, a fact that helped early astronomers understand that Earth is spherical.
Total lunar eclipses occur when the Sun, Earth, and Moon align with Earth positioned directly between the Sun and the full Moon. Even during totality the Moon does not disappear; instead it turns red because sunlight passing through Earth’s atmosphere is filtered and bent into the shadow, allowing mostly red wavelengths to reach the lunar surface. The recent eclipse was visible across much of the Americas and lasted several hours from beginning to end, offering skywatchers a slow and dramatic celestial event.
his composite shows the progression of a recent total lunar eclipse as Earth’s shadow slowly moved across the full Moon. Beginning at left, the Moon enters the dark inner shadow of Earth (the umbra), gradually dimming until totality occurs near the center of the sequence, when the Moon glows a deep copper-red. The curved edge of Earth’s shadow reveals the round shape of our planet, a fact that helped early astronomers understand that Earth is spherical.
Total lunar eclipses occur when the Sun, Earth, and Moon align with Earth positioned directly between the Sun and the full Moon. Even during totality the Moon does not disappear; instead it turns red because sunlight passing through Earth’s atmosphere is filtered and bent into the shadow, allowing mostly red wavelengths to reach the lunar surface. The recent eclipse was visible across much of the Americas and lasted several hours from beginning to end, offering skywatchers a slow and dramatic celestial event.