A planet twice the size of Earth has been discovered by the Astronomers and it's within a zone that could allow liquid water to exist on its surface. The finding comes from data from NASA's Kepler space telescope, which ran out of fuel in October 2018. K2-288Bb, as the new planet is called, is located within its star's habitable zone, which is why liquid water is a possibility. Its size is unusual for an exoplanet. Few planets that orbit close to their stars are more than 1.5 times as large as Earth, yet K2-288Bb is estimated to be roughly 1.9 times the size of our planet. According to NASA, the planet is half the size of Neptune and could be gas-rich, though it's possible that it's rocky instead. K2-288Bb is located in the Taurus constellation and is about 226 light-years away. The new planet orbits the smaller of two cool stars in the stellar system called K2-288. These stars are about 5.1 billion miles apart, and the dimmer one is one-third as massive as the sun. Kepler, which died nine years after launching into space, has discovered more than 2,600 confirmed planets. About 50 of them may be the same size and temperature as Earth. Data from Kepler has helped scientists determine whether a given planet has a solid surface, like Earth, or a gaseous one, such as Jupiter. Since Kepler is no longer hunting for planets, NASA is now hoping that a new space telescope will aid in the search: the Transiting Exoplanet Survey Satellite (TESS). TESS began its two-year mission in April 2018, and it will examine 200,000 nearby stars as it looks for rocky, Earth-size planets. According to Paul Hertz, the director of NASA's astrophysics division, Kepler has shown that there are more planets than stars in our sky, and now TESS will show variety of planets around some of the closest stars and will cast a wider net than ever before for enigmatic worlds.