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By now you've probably heard the news about our solar system not quite being the shape that everybody thought. A study in Nature today shows results gathered from the two Voyager space probes launched in the 1970s, which are both nearing the edge of the heliosphere, the region where the solar winds end and deep space begins. Based on data the probes beamed back, it would appear that the heliosphere isn't a sphere — it's more of an egg shape (pictured). And the boundary between heliosphere and deep space is shifting all the time. It sounds very similar to the way scifi author Vernor Vinge describes the Milky Way's galactic sphere in A Fire Upon the Deep. If Vinge is right about what happens when you leave a gravitational sphere for deep space, the Voyager probes are in for an interesting ride. More »
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