Comet c/2013 a1 as seen by nasa's hubble space telescope

Comet C/2013 A1

The 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)