... Arecibo: The Largest Telescope . ... The Arecibo radio telescope is currently the largest single-dish telescope in the world. ... Europa's Ice Rafts . ... The surface of Jupiter's moon Europa has shifted. Photographs released yesterday of Europa's surface taken by the spacecraft Galileo show that the smooth moon's icy surface is sometimes like a giant scrambled jigsaw puzzle. ... Comet Hale-Bopp Over New York City . ... What's that point of light above the World Trade Center? ...