|MadSci Network: Earth Sciences|
Hi Ben, The shape of a bubble results from the very strong surface tension of the liquid from which the bubble is made. This surface tension is much stronger than gravity. Therefore, the shape of a bubble in space would be the same as that here on the ground, a sphere. The sphere might be a little bit rounder and it might last a little bit longer than it would on the Earth. You can find the answer from others and more information about this question at Bubbles in Space John Haberman, Space Scientist NASA/Goddard Space Flight Center
Try the links in the MadSci Library for more information on Earth Sciences.