Man has been amazed by comets for millenia. What are they, these beautiful wanderers?  There have been many theories, the most popular being that they are balls of ice.  Now we are actually getting data.  The photographs taken by the European Space Agency's Rosetta spacecraft show comet Churyumov-Gerasimenko to be more rocklike than a ball of ice. After sailing through space for more than 10 years, the Rosetta spacecraft is now less than a week shy of landing a robotic probe on a comet. The mission's Philae (fee-LAY) lander is scheduled to touch down on comet 67P/Churyumov-Gerasimenko on Wednesday, Nov. 12 at 7:35 a.m PST/10:35 a.m. EST. A signal confirming the landing is expected about 8:02 a.m. PST/11:02 a.m. EST. If all goes as planned with this complex engineering feat, it will be the first-ever soft landing of a spacecraft on a comet.