NASA explains Pluto's newly discovered "blue sky" and whether or not potential astronauts could ever witness an Earth-like sunrise. The New Horizons space probe sent back its first color images of ...

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Pluto's haze layer shows its blue color in this picture taken by New Horizons. The high-altitude haze is thought to be similar in nature to what we see at Saturn's moon Titan. The source of both hazes ...

CAPE CANAVERAL, Fla. – The sky over Pluto may not be sunny but it’s undoubtedly blue. NASA’s New Horizons spacecraft discovered Pluto’s blue sky during the historic flyby of the icy dwarf planet in ...

Before Pluto was discovered, it was predicted. Astronomers had observed that massive objects can affect the orbits of their neighbors and, after seeing deviations in the orbits of Uranus and Neptune, ...