This NASA image of the sun captured Oct. 8, 2014, looks like a jack-o-lantern face. (NASA/GSPC/SDO)

The sun as imaged by the Solar Dynamics Observatory on Oct. 8, 2014, in extremeultraviolet light. (NASA/SDO)

Photo By NASA

Photo By Boyd, John/Source: "Earth as Art," published by NASA

Garden City, Kansas Center-pivot irrigation systems created the circular patterns near Garden City. The red circles indicate irrigated crops of healthy vegetation, and the light-colored circles denote harvested crops.

Photo By Boyd, John/Source: "Earth as Art," published by NASA

Carnegie Lake, Australia Ephemeral Carnegie Lake, in Western Australia, fills with water only during periods of significant rainfall. In dry years, it is reduced to a muddy marsh.

Photo By Boyd, John/Source: "Earth as Art," published by NASA

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NASA image of the sun looks like jack-o-lantern face