In July, NASA's New Horizons spacecraft took us to Pluto for the first time. The photos the craft sent back so far have astounded researchers. New Horizons principal investigator Alan Stern says ...

A new animation shows the orbits of hundreds of dwarf planets beyond Pluto. The astronomer who compiled the data says it may capture just a small fraction of dwarf planets in the solar system.

To underscore this point, a researcher at NASA created a simple new animation (below) that shows what light-speed travel looks like between from the sun to Pluto. James O'Donoghue, a planetary ...