The last time EHT teased us like this, it revealed the first image of a black hole. Who would forget that?! The Event Horizon Telescope (EHT) has discovered something amazing in the Milky Way galaxy, which its researchers are calling “groundbreaking.” But we won’t find out what that revelation is until Thursday (May 12). The Event Horizon Telescope (EHT) team teased the discovery online, but the complete announcement will be made at 9 a.m. EDT (1300 GMT) during a series of news conferences sponsored by institutions all across the world. The public will be able to watch the Milky Way discovery events live. Following the press conferences, the National Science…