The authors therefore consider how observations made by spacecraft of the Solar System have led to the development of approaches for detecting signatures of habitability and life on other worlds. Thus, when someone asks, “What will a habitable exoplanet look like?” or “What will a life-bearing exoplanet look like?”, our best option is to point to Earth and say, “Maybe it will look a lot like this.” While many studies have hypothesized other habitable planets (e.g., water-covered super-Earths), our leading example of a fully-functioning habitable planet will always be Earth.” “Earth is – currently! – our only example of a habitable and an inhabited world. As Professor Robinson told Universe Today via email: This is to be expected, since Earth is the only planet that we know of that can support life. Credit: NASA/JPLįor the sake of their study, Robinson and Reinhard focus on how the hunt for habitable and inhabited planets beyond our Solar System commonly focuses on Earth analogs. Thanks to advances in technology and detection methods, astronomers have detected multiple Earth-like planets in our galaxy. Reinhard – an assistant professor from the Georgia Institute of Technology’s School of of Earth and Atmospheric Studies. Robinson, a former NASA Postdoctoral Fellow and an assistant professor from Northern Arizona University, and Christopher T. The paper, titled “ Earth as an Exoplanet“, recently appeared online. Together, they consider what advances (past and future) will be key to the search for Earth 2.0. But would we recognize a truly “Earth-like” planet if we saw one? This question was addressed in a recent paper by two professors, one of whom is an exoplanet-hunter and the other, an Earth science and astrobiology expert. In the course of looking for habitable planets, astronomers have used Earth as a guiding example. In addition to expanding our knowledge of the Universe, the purpose of this search has been to find evidence of life beyond our Solar System. As of April 1st, 2018, a total of 3,758 exo planets have been confirmed in 2,808 systems, with 627 systems having more than one planet. In the past few decades, there has been an explosion in the number of extra-solar planets that have been discovered.
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