You are in free guest mode.
Timed Practice
Revision List
Attempt History
Progress Tracking
Create a free account to unlock these tools
Practice Listening: Fill in the Blanks (Type In)
ID: #902
Short
Black holes
* Fill in the missing words into the blank fields
The next topic is going to be black holes, and this is a similar situation. Fifteen, twenty years ago black holes were sort of poised on the boundary between theoretical physics and science fiction. A boundary that is more than you might believe. But again, in the past fifteen years or so this has been converted into a standard topic in observational . There are dozens, probably hundreds of objects we can point to in the sky and say, "yes those things are black holes." And so now, the current topic of research is do these things that we are pretty sure are black holes actually behave in the incredibly , science-fictiony manner that the theoretical physicists have been talking about for the past thirty or forty years. So, to what extent are these very exotic behaviors actually in real life?
Result:
With a free account:
Retry and compare every attempt.
Saving...