Photos taken by NASA's Moderate Resolution Imaging Spectroradiometer (MODIS) on the Terra satellite satellite on May 17th and released Wednesday show that the BP oil spill has a massive 'arm' that is spreading out in the Southeast direction.
Based on the 25 km reference in the bottom left corner of the NASA image, the 'arm' is hundreds of kilometers long. However you slice it, and whatever the actual number of barrels/day is (and nobody's certain yet), that's a lot of oil!
Image credit: NASA's Earth Observatory/U.S. Naval Research Laboratory