How might a sunrise appear on Gliese 581c? One artistic guess is shown above. Gliese 581c [ http://en.wikipedia.org/wiki/Gliese_581c ] is the most Earth-like planet [ http://eso.org/outreach/press-rel/pr-2007/pr-22-07.html ] yet discovered and lies a mere 20 light-years [ http://chandra.harvard.edu/photo/cosmic_distance.html ] distant. The central red dwarf [ http://antwrp.gsfc.nasa.gov/apod/ap991120.html ] is small and redder than our Sun [ http://www.nineplanets.org/sol.html ] but one of the orbiting planets has recently been discovered to be in the habitable zone [ http://www.pbs.org/lifebeyondearth/alone/habitable.html ] where liquid water could exist on its surface. Although this planet is much different from Earth [ http://antwrp.gsfc.nasa.gov/apod/ap070325.html ], orbiting much closer than Mercury [ http://antwrp.gsfc.nasa.gov/apod/ap040912.html ] and containing five times the mass of Earth, it is now a candidate to hold not only oceans but life [ http://www.windows.ucar.edu/tour/link=/life/ocean_life.html ] enabled by the oceans. Were future observations to confirm liquid water, Gliese 581c [ http://antwrp.gsfc.nasa.gov/apod/ap070426.html ] might become a worthy destination or way station for future interstellar travelers [ http://www.strangehorizons.com/2004/20040621/travel.shtml ] from Earth. Drawn above in the hypothetical, the red dwarf star Gliese 581 [ http://en.wikipedia.org/wiki/Gliese_581 ] rises through clouds above a calm ocean [ http://antwrp.gsfc.nasa.gov/apod/ap061017.html ] of its planet Gliese 581c.