Nasa announcement: How to watch the major breakthrough as it is announced live, and when it will happen

Nasa is about to make a major announcement about a breakthrough in its planet-hunting project. The company has set a date for the press conference at which it will reveal all about the mysterious discovery. There's very little information about what's actually going to be revealed. It will involve exoplanets, something being detected by the Kepler space telescope, and the use of AI – beyond that everything is just guesswork, though you can read a bit more detail on what we do and don't know here. Nasa will reveal all on Thursday, 14 December.