Debris field on Jupiter from the 2009 impact. (a) Discovery images obtained by Anthony Wesley. (b) HST/WFC3 image of Jupiter showing the impact debris about seven Jupiter rotations later. (c) Series of observations with small-size telescopes of the expansion of the dark debris. (d) Images obtained with HST over similar dates. Data from panel (a) from Sánchez-Lavega et al. (2010). Data from panels (b) and (d) from Hammel et al. (2010). Data from panel (c) from Sánchez-Lavega et al. (2011).