In the search for an Earth twin that might support some form of life, astronomers are expected to be launch TESS(Transiting Exoplanet Survey Satellite) on April 16th. They are looking for a place that is not too hot and not too cold, so that water can exist on the surface. These worlds are called exoplanets. It's hard to see them because they're hidden by the glare of their stars. More than 3,700 exoplanets have been confirmed so far including more than 50 that might be able to support life. Scientists with MIT (Massachusetts Insitute of Technology) and NASA are working on the mission.