... Hale-Bopp and the Plateau de Bure Interferometer . ... Comet Hale-Bopp is being observed by many different telescopes. ... These telescopes are being used to detect the presence of different molecules in the coma and tail of Comet Hale-Bopp. ... Comet Hale-Bopp is spinning. ... As Comet Hale-Bopp spins, parts of the comet's surface shoot away in jets. ... Arecibo: The Largest Telescope . ... Europa's Ice Rafts . ... The surface of Jupiter's moon Europa has shifted. ... Oceans Under Jupiter's Europa?...