Some things are hard to visualize. Like a 100 trillion dollars. Or four billion years. Here's another one to add to the list: a black hole 12 billion times the size of the sun. International researchers in China discovered the "monster" black hole and just published the findings [1] in Nature this week.

Imagine 12 billion suns put together. It's six times as large as any black hole previously discovered. You can find it two billion light-years away from our tiny little planet. So what's a black hole anyways? According to NASA, a black hole is [2] "a region of space having a gravitational field so intense that no matter or radiation can escape it." In other words: what comes in never goes out.