How much of the night sky is lensed? Is there any estimates of how much you see is duplicates, or is it a rare occurance?

So the cool thing is as they watch this over the next three years, they will see the same image develop of three objects to two.

Because they can see the various stages of the supernova in the three images, and supernovas are fairly well understood from a timing and energy mass ejection standpoint.

No, it is one image. The objects are behind another supermassive object which causes gravitational lensing, and you see it three times. Because of the extra distance it has to travel as the light bends, you are seeing the objects in different moments in time.

Edit: I forgot to mention there is also something called time dilation with gravity, and the more you have it the slower time travels, so the images that are lensed with the most gravity arrive later in time.

Anyone who thinks a 16TB SSD drive can be bought for $70, please come see me I have a nice bridge I’d like to sell you.

Do you reattach your ass after no one laughed at the joke

In Canada it would be a boot time

Why does Hillary hate golf?

Because Bill's balls keep ending up in the wrong hole.

If I could give you 10,000 upvotes, I would. Well done.

Also, thanks for ruining the joke.