Comet C/2013 A1The images above show -- before and after filtering -- comet C/2013 A1, also known as Siding Spring, as captured by Wide Field Camera 3 on NASA's Hubble Space Telescope.Credits: NASA, ESA, and J.-Y. Li (Planetary Science Institute) Download Share Tags Hubble Space TelescopeImage CreditNASA, ESA, and J.-Y. Li (Planetary Science Institute)Size1024x513px