... Moon Shadow . ... When the Moon's shadow reached out and touched the Earth last month, the result was a Solar Eclipse. ... This total solar eclipse was the last visible from the Americas for this millennium. A total solar eclipse is exciting partly because it is so short. Cracks and Ridges on Europa . ... What appears to be a caricature of a complex highway system on Earth is actually a system of ridges and cracks on the icy surface of Jupiter's moon Europa. ... Water Ice At The Lunar Poles . ...