Apr 15, 2014 10:16 AM by Stephen Bowers
Many of you have posted pictures from last night's lunar eclipse, or the so-called "Blood Moon" to our Facebook page. Here is a gallery of some of those pictures we have received. If you have pictures you would like to post, just visit our Facebook page.
Why does a lunar eclipse turn red. It's all about light passing through Earth's atmosphere. The Sun's light hits Earth to create the shadow, and on the sunny side of earth all that "white light" from the Sun, which contains ALL colors of the spectrum, hits the air molecules in the atmosphere. Those air molecules are tiny and help to scattered SHORT wavelengths of light, which is why the sky is blue in the daytime.
Imagine viewing Earth from the Sun. The Sun's light passes through the atmosphere on the left and right sides of the earth at very low angles, which means that light passes through more of our atmosphere. Those left and right edges of Earth (from the Sun's perspective) turn RED because the Sun's light has to pass through so much atmosphere longer wavelengths are scattered. Those right and left edges of Earth from the Sun's perspective are where sunrises and sunsets are occurring -- so this is why the sky turns red at sunrise and at sunset.
The Sun's light passing through the edges of Earth's atmosphere turns red, and that red light reflects off the moon during the lunar eclipse, giving the moon it's blood-red hue that is so common when the moon is deep within Earth's shadow.
Need a visual? Use a globe (or even a ball) and a flashlight. Shine the light on the globe, and you see the globe's shadow and how the light weakens around the left and right edges of that globe. You also can see how light also passes around the globe on the sides. If that globe had a gas-filled atmosphere, you would some changing colors.