Total Lunar Eclipse - seen from Hamburg
by Wolfgang Fraedrich, Hamburg, Germany
Total Lunar Eclipse over Hamburg (Germany) on September 28, 2015 at 4:15 am CEST (= 2:15 am UTC) - just before the total eclipse. A lunar eclipse can only occur at full moon. It occurs when the moon enters the earth's shadow. Then the earth is between the sun and the moon. Sun, earth and moon are approximately on a straight line. The sun shines on the earth and this casts a shadow towards the moon. If the moon moves through the earth’s shadow, the lunar eclipse occurs. This shadow is also called core shadow. As the moon does not always move through the earth’s shadow on its monthly orbit, but also above or below the earth's shadow, there is no lunar eclipse every month. In a total lunar eclipse, you can see the moon in copper-red light. This light is sunlight falling through the earth's atmosphere onto the moon. The blue part of the sunlight was already broken and scattered in the earth's atmosphere.
Wolfgang Fraedrich (distributed via imaggeo.egu.eu)