Last week, I was on camp with Sara. Had a cheerful bunch of 16yr old kids. One interesting kid, David, chinese Malay, asked me lots of questions about how to choose a career , money versus interests and so on. He said something which should be heard more often in Oz, and the west in general:
One night - we did a "star session" - where we point out constellations, stars amd planets like Venus (the brightest). I ended up on a real roll, talking about how stars can become black holes, how even light is sucked into a black hole, so great is the gravity. And that the idea that light has a mass was introduced by Einstein, and then verified experimentally in the 50s, if I remember rightly, by two physicists who pointed a telescope ast two neighbouring stars when a planet came between them, and witnessed that the stars appeared to come closer together for a time - ie the planet was bending the rays light slightly as they went past it. Then went on to talk about protons, neutrons, fusion reactions going on inside the sun. And how experimental fusion has been obtained in a UK laboratory (JET). using superconducting magnets to maintain the plasma that is created when you fuse hydrogen atoms together.