Kayla ’s Reviews > Astrophysics for Young People in a Hurry > Status Update

Yes, I realize this book is for children. However, I was only ever deeply into biology as a kid, so the physics stuff passed me by almost completely. In conclusion, I may be stupid.

Case in point: I don't understand how the universe can have expanded several light-years in a single second if light... particles.... can't move that fast. Neil, please explain?