[Mr. K]

"Think of it: Gravity waves come to us from the edge of the universe, from the beginning of time, unchanged,"

I have never been able to understand this thinking. If waves are arriving right here and now from the beginning of time, then why didn't they arrive one minute ago or 2 days from now?

Are they saying that any time you look you will be able to observe the same moment?

I dunno- my head hurts thinking about it. (and I have a BS in Physics AND another one in computer science...)

[Physicist]

You might be interested in this response, and its follow-ups.

[RightWhale]

Are they saying that any time you look you will be able to observe the same moment?

No, they mean that they can see gravity waves passing by earth now whether the gravity waves started out last week just past Pluto, or 14 billion years ago when some star first came to life. It might be important to note that the Big Bang occurred everywhere, even right here where earth sits today. Old events would be visible now if they were also just far enough away that their light or gravity wave is just arriving.