To those who are into astronomy:
Science:
On NASAs website:
http://science.nasa.gov/headlines/y2004/13oct_lunareclipse.htm
http://www.nasa.gov/vision/universe/watchtheskies/13oct_lunareclipse.html
http://spacescience.com/headlines/y2000/ast02feb_1.htm
October 13, 2004: According to folklore, October's full moon is called the "Hunter's Moon" or sometimes the "Blood Moon." It gets its name from hunters who tracked and killed their prey by autumn moonlight, stockpiling food for the winter ahead. You can picture them: silent figures padding through the forest, the moon overhead, pale as a corpse, its cold light betraying the creatures of the wood.
What makes the eclipsed moon turn red? The answer lies inside Earth's shadow:
Our planet casts a long shadow. It starts on the ground--Step outside at night. You're in Earth's shadow. Think about it!--and it stretches almost a million miles into space, far enough to reach the moon.
Suppose you had a personal spaceship. Here's your mission: Tonight, at midnight, blast off and fly down the middle of Earth's shadow. Keep going until you're about 200,000 miles above Earth, almost to the moon. Now turn around and look down. The view from your cockpit window is Earth's nightside, the dark half of our planet opposite the sun. But it's not completely dark! All around Earth's limb, the atmosphere glows red.
What you're seeing is every sunrise and sunset on Earth--all at once. This ring of light shines into Earth's shadow, breaking the utter darkness you might expect to find there. Turn off the cockpit lights. There's a lovely red glow.
White light from the Sun is a mixture of all the colors of the rainbow. When a ray of "white" sunlight passes at grazing incidence through Earth's atmosphere, molecules and aerosols in the air scatter blue light in all directions (this is why the sky is blue). The remaining reddish light is bent (refracted) into Earth's umbral shadow zone, giving the eclipsed Moon a coppery glow. Image credit: Tony Phillips.
For more info on Solar and Lunar Eclipse:
http://sunearth.gsfc.nasa.gov/eclipse/eclipse.html
Science:
On NASAs website:
http://science.nasa.gov/headlines/y2004/13oct_lunareclipse.htm
http://www.nasa.gov/vision/universe/watchtheskies/13oct_lunareclipse.html
http://spacescience.com/headlines/y2000/ast02feb_1.htm
October 13, 2004: According to folklore, October's full moon is called the "Hunter's Moon" or sometimes the "Blood Moon." It gets its name from hunters who tracked and killed their prey by autumn moonlight, stockpiling food for the winter ahead. You can picture them: silent figures padding through the forest, the moon overhead, pale as a corpse, its cold light betraying the creatures of the wood.
What makes the eclipsed moon turn red? The answer lies inside Earth's shadow:
Our planet casts a long shadow. It starts on the ground--Step outside at night. You're in Earth's shadow. Think about it!--and it stretches almost a million miles into space, far enough to reach the moon.
Suppose you had a personal spaceship. Here's your mission: Tonight, at midnight, blast off and fly down the middle of Earth's shadow. Keep going until you're about 200,000 miles above Earth, almost to the moon. Now turn around and look down. The view from your cockpit window is Earth's nightside, the dark half of our planet opposite the sun. But it's not completely dark! All around Earth's limb, the atmosphere glows red.
What you're seeing is every sunrise and sunset on Earth--all at once. This ring of light shines into Earth's shadow, breaking the utter darkness you might expect to find there. Turn off the cockpit lights. There's a lovely red glow.
White light from the Sun is a mixture of all the colors of the rainbow. When a ray of "white" sunlight passes at grazing incidence through Earth's atmosphere, molecules and aerosols in the air scatter blue light in all directions (this is why the sky is blue). The remaining reddish light is bent (refracted) into Earth's umbral shadow zone, giving the eclipsed Moon a coppery glow. Image credit: Tony Phillips.
For more info on Solar and Lunar Eclipse:
http://sunearth.gsfc.nasa.gov/eclipse/eclipse.html