Styx (moon)
The moon was discovered using nine sets of images taken between 26 June and 9 July 2012 by Wide Field Camera 3 of the Hubble Space Telescope. NASA announced the discovery on 11 July 2012. The images were taken as part of a Hubble survey searching for potential hazards for the New Horizons mission. The New Horizons space probe is going to Pluto at the moment and will arrive in July 2015. The discovery of the moon has made scientists worried about the mission. Pluto may have more bodies, such as dust or rings, orbiting it which cannot be found. These bodies could damage the New Horizons probe. The current plan for New Horizons is that it will pass just inside the orbit of Charon. But this could change if scientists think that the space probe will be damaged.