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Scientists have accidentally discovered details about a "very exciting" planet orbiting a nearby star system, which is thought to contain more water than Earth.... ...It orbits a sun-like star around 50 light years away from us that is visible with the naked eye, has a mild atmospheric temperature and appears to contain a large amount of water. Researchers already knew that the planet was there because previous studies of the star, called Nu2 Lupi, showed that it had three planets orbiting it called b, c, and d. ...Using Cheops, researchers determined that planet d has a radius 2.5 times bigger...

Scientists have shown that water is likely to be a major component of those exoplanets (planets orbiting other stars) which are between two to four times the size of Earth. It will have implications for the search of life in our Galaxy. The work is presented at the Goldschmidt Conference in Boston. The 1992 discovery of exoplanets orbiting other stars has sparked interest in understanding the composition of these planets to determine, among other goals, whether they are suitable for the development of life. Now a new evaluation of data from the exoplanet-hunting Kepler Space Telescope and the Gaia mission...