[Q&A] Real Danger from Solar Flares, Lagrange Interferometers, Interstellar Communications

How bad can a solar flare really be for the Earth? What would evolution in an isolated star system look like? What damage can a rogue planet flying through the Solar System cause? When will we have Lagrange point interferometers? What's the speed limit for gravitational assists? Answering all these questions and more in this week's Q&A.;