X-ray mystery shrouds Pluto

Despite wrong conditions, handful-plus of photons detected streaming from dwarf planet


X-RAY SURPRISE An unexpected trickle of X-rays (blue) surrounds Pluto, possibly from a tail of gas dragging behind the dwarf planet.

X-ray: NASA, CXC, JHUAPL, R.McNutt et al; Optical: NASA, JHUAPL

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