Not too long ago, astronomers were excited to have discovered the first extra-solar planet (planets outside of our own solar system). It was only 1991. The discovery somehow made the infinitely huge universe seem that much larger.
Since then astronomers have identified nearly 350 planets abroad in the Milky Way. Some of them, scientists speculate, are likely to have similar conditions to our own planet Earth.
Now there’s a new reason to feel that the universe is expanding. Astronomers are saying that they may have seen the first extra-galactic planet. It showed up when they applied a microlensing technique in the direction of the Andromeda Galaxy, a galaxy far, far away, roughly 2.5 million light years away. The new planet is said to have six times the mass of Jupiter.