system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does the moon appear red in the "Total Lunar Eclipse" instead of being invisible as happening in "Partial Lunar Eclipse"?
gpt
When the earth is squarely in front of the sun, from the moon's perspective, you're still seeing sunlight through the edges of the earth's atmosphere. Like a 360-degree horizon. What does the sun look like when it's just at the horizon during sunrise or sunset? It's red. You're seeing every sunrise and sunset happening on Earth at that moment, all at once.