This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Pluto System french. These Hubble Space Telescope images taken by the Advanced Camera for Surveys reveal Pluto its large moon Charon and the planet's two new putative satellites In the shortexposure image left taken June the candidate moons cannot be seen They do however appear in the middle and righthand images Longer exposure