Last year, the first actual photograph of a black hole got world-wide media attention.
Although it’s not really a photograph of the black hole itself, as that’s impossible to take – because a black hole is, well, a black hole. The very nature of it makes it impossible to see.
But what was on the photo, then?
The so-called “event horizon”: the stuff around the black hole, or, to be more precise, the black hole’s effect on the light which surrounds it.
It’s a bit like taking an image of a shadow instead of the actual object.
Where else can you see the effect of something, but not the thing itself?
What else could you make visible by showing its effects?
I’d love to read about your ideas in the comments below!
Wanna learn more about how to take images of something that can’t be seen? Check out this video: