Exoplanets found orbiting former extragalactic star

An international team of astronomers has uncovered the most ancient habitable exoplanet found to date. The discovery is all the more interesting because the planet originated outside of our Milky Way galaxy. At around 11.5 billion years old, the super-Earth is more than twice as old as our own planet and shows that habitable worlds were around much earlier in the universe’s history than previously thought. What is more, at 11 light years from Earth, it is a near neighbour.

Read more from Physics World June 5 2014