NASA's New Horizons spacecraft continues to relay startling images back to Earth and the latest shows Pluto wrapped in a layer of blue haze. According to NASA, the glow is caused by tiny grey or red particles that scatter blue light. Pluto's surface is reddish in color.
“Who would have expected a blue sky in the Kuiper Belt?" said Alan Stern, New Horizons principal investigator, referring to a broad ring of icy mini-worlds beyond Neptune where Pluto makes its home.
Gallery: Month in Space Pictures