I was watching a YouTube video about the planets that have been discovered many light years from Earth. The detail in their descriptions left me doubtful about the actual science behind the discoveries. After all, how can you possibly glean so much from something that is tens of light years away? Wanting the truth, I asked my nephew who is working on his doctorate in astrophysics. He said, yes, they can determine quite a bit about distant planets from the light they reflect. Still, I find it hard to believe.