What could be more worldchanging than discovering a new world? Such as Sedna, the farthest known object in our solar system, identified in March 2004 by researchers at the California Institute of Technology. They named the possible planet for an Inuit sea goddess.
NASA and the European Space Agency have commissioned an artist's rendition of the view from Sedna.
For more on space science, read Jamais' recent entry on the Encyclopedia Astronautica.