UPDATE:  SOLVED at 1:02 pm CDT by Kristian

It’s riddle time!  Are you alert and ready for this?  You are getting pretty clever out there.  I have people who have already solved riddles emailing me with the answer, sometimes within a minute or two of my publishing the riddle.  Have you been doing your homework?  I can’t wait until the bonus riddle.  Tom and I are going to rock your world!

Okay, get those neurons excited and ready to fire.  Here’s your Saturday riddle:

Today’s riddle answer is an object, but it was an event, also.

It caused quite an uproar in its time.

It wasn’t a “first”, and certainly not a “last”, but it was very important.

What we see now is not what it was.

It’s not modern, but it’s not ancient, either.

Something of a mystery in its own time, it was solved in the early 1940’s.

It has been called a “cornerstone” in astronomical history.

It’s named for someone who did not actually discover it.

This was studied recently using a new technique, pioneered to be able to watch a “rerun” of this event.

You can call it an event; you can call it an object.  You’re accurate to say what it is now, or what it was.

How’s that for a riddle?  I bet you can figure it out; after all, you’ve heard about it all your lives.  No, really.  It’s very familiar.

So, you know where I’m hanging out.  Last week’s riddle was shot down in six minutes flat.  Let’s see if you can solve this one faster.

Here I am... quietly lurking.