Pluto could be about to become a planet again, after scientists spotted what appears to be clouds on its surface. As part of new horizons mission which has already found far more complexity on pluto than had been expected -scientists have spotted clouds like parts of the images released from the mission. That could mean that the planet has an ever richer atmosphere that had been thought.
Scientists aren't yet sure that the images show cloud. But emails seen by the magazines seem to indicate that the now dwarf planet might have clouds made up of the same things in its general atmosphere, which is mostly made of nitrogen.
This discovery could lead to further calls for pluto to be reinstated as a planet. Pluto still won't satisfy the International Astronomical Unions rules for what is and isn't a planet. It was excluded on the basis of a criterion that it still doesn't pass, whether or not pictures show clouds: that a planet should have clear neighbour of orbiting bodies. But that IAU definition has proven controversial with scientists arguing that the definition is complicated.
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