Heidi Hammel improvements to the adaptive optics systems of the Keck telescope, astronomers became able to capture "unbelievably crisp images" and view many details that could not be seen before. Hammel's planetary research with Hubble and Keck has demonstrated that both Uranus and Neptune are dynamic worlds. Hammel primarily studies the outer planets and their satellites, focusing on observational techniques. She was a member of the Imaging Science Team for the Voyager 2 encounter with the planet Neptune in 1989. In 1994, Hammel led the team that investigated Jupiter's visible wavelength response to the impact of comet Shoemaker-Levy 9 using the Hubble
The Elves and the Shoemaker cartoon short "Holiday for Shoestrings". In the "Due South" episode, "The Deal", Det. Ray Vecchio vaguely recollects this story when discussing a poor cobbler with his partner, Constable Fraser. In "", a spinoff miniseries of the Vertigo comic-book series "Fables", the shoemaker appears as an employee in Cinderella's shoe store, while the elves are the builders and suppliers of the store's inventory. "Muppet Classic Theater" had a version where a shoemaker (played by Kermit the Frog) faces ruin until his livelihood is saved by a group of philanthropic entertainers (played by The Elvises) who, naturally, make only blue suede shoes.