There have been many discoveries of potentially habitable planets orbiting stars other than our own over the last few years. Now things are getting even more exciting. Scientists have documented a star surrounded by no fewer than seven Earth-like planets – several or all of which could be at the right temperature for liquid water, and potentially life, to exist.
But is it possible to know anything about what these planets are like beyond simple measures such as temperature and mass? There are indeed several factors that can give us a clue. So let’s take a look at