Spectrograph can tell you very specifically what the movement is and what the chemical composition is of that object. From that, we can start to do incredible research, and infer important things about how planets form or stars form. And i want to say one more thing. A lot of people think that this stuff is just so esoteric, and it's like superinteresting why weespending ten billion dollars amiss most applied engineering. We are going to discover amazing things with this tool,. It will ultimately, hopefully, yield advances for human kind that we cannot even contemplate to day.