What is frame dragging? How do we measure it? And how can we turn this into a method for extracting energy from rotating black holes?
Just how hard are exoplanets observations? What kind of telescope will it take to find life? And how much information can we get out of a single pixel of light?
What was the big deal about Chandrasekhar’s discovery? Why did he meet so much resistance? How is his work tied to everything from supernovae to black holes?
What does high-speed motion through the universe do to your perspective? What is the Rindler horizon, and how does it appear? Would you get vaporized by a high-energy bath of radiation?
What really keeps the Sun shining? How long would it stay warm if fusion stopped? How long would it take before we noticed?