The Mystery of the Universe's Bubbles

The Hubble Space Telescope (HST) orbits 600 kilometers above the Earth's surface, beyond the planet's image-distorting atmosphere. It provides clear images of our universe and can even take vivid photographs of galaxies with hundreds of billions of stars at the outer reaches of the cosmos. Recently over 100 scientists from around the world gathered for the most ambitious HST observation project to date. They were trying to work out the structure of the galaxies. Near Earth, many galaxies are clustered together like soap bubbles. Will these bubbles continue expanding far into the universe? Using the HST, scientists at the frontline of space exploration try to find the answer.