http://www.deepskyfrontier.com/
Test it for yourself. Using the arrow keys to scroll, see if you can move the scroll button even one pixel. On second thought, don't-- especially if you're the doggedly persistent type. To do so will take about seven times longer than your natural lifespan. This method causes you to "move" across the plane of this page at the equivalent of a toddler's walking pace-- around 0.5 mph. At this rate, it would take you half a million years to cross from one end to the other.