I stumbled across this forum looking for answers about lightyears (how far, how long to travel one). The answers I found in a thread, and the discussion was interesting. I'm here mostly to read and learn, but I'd also like to be able to contribute if something moves me to do so.
Welcome! I also, stumbled upon this forum looking for answers to a physics question, although never answered (not very plausible it seems) I am hooked. Enjoy!