The Earth, along with the rest of the solar system, was born around 4.6 Billion years ago.  At that time, Earth was part of the early group of habitable planets to form in the Universe.  According to a new theoretical study from the Space Telescope Science Institute (STScI), the vast majority of Earth-like planets has yet to form. Using data from the Hubble space Telescope (HST) and the Kepler Space Telescope (KST), astronomers were able to come up with a theoretical model of cosmic evolution, detailing how planets will form over the entire lifespan of the Universe. “Our main motivation was...