full transcript

From the Ted Talk by Andrea Ghez: The hunt for a supermassive black hole

Unscramble the Blue Letters

So, this is great, because remember my job is to show there is a lot of mass inside a small volume. So, if I know how fast it goes around, I know the mass. And if I know the scale of the orbit I know the radius. So, I want to see the sarts that are as close to the cetenr of the galaxy as possible. Because I want to show there is a mass inside as smlal a region as possible. So, this means that I want to see a lot of detail. And that's the reason that for this experiment we've used the world's lrseagt telescope.

Open Cloze

So, this is great, because remember my job is to show there is a lot of mass inside a small volume. So, if I know how fast it goes around, I know the mass. And if I know the scale of the orbit I know the radius. So, I want to see the _____ that are as close to the ______ of the galaxy as possible. Because I want to show there is a mass inside as _____ a region as possible. So, this means that I want to see a lot of detail. And that's the reason that for this experiment we've used the world's _______ telescope.

Solution

  1. stars
  2. largest
  3. center
  4. small

Original Text

So, this is great, because remember my job is to show there is a lot of mass inside a small volume. So, if I know how fast it goes around, I know the mass. And if I know the scale of the orbit I know the radius. So, I want to see the stars that are as close to the center of the galaxy as possible. Because I want to show there is a mass inside as small a region as possible. So, this means that I want to see a lot of detail. And that's the reason that for this experiment we've used the world's largest telescope.

Frequently Occurring Word Combinations

ngrams of length 2

collocation frequency
black hole 34
supermassive black 16
black holes 12
schwarzschild radius 7
ordinary black 4
finite size 2
gravity wins 2
schwarzschild radii 2
star light 2
active galactic 2
galactic nuclei 2
small volume 2
campaign promise 2
continuously moving 2
million times 2

ngrams of length 3

collocation frequency
supermassive black holes 8
supermassive black hole 6
ordinary black hole 3
active galactic nuclei 2

Important Words

  1. center
  2. close
  3. detail
  4. experiment
  5. fast
  6. galaxy
  7. great
  8. job
  9. largest
  10. lot
  11. mass
  12. means
  13. orbit
  14. radius
  15. reason
  16. region
  17. remember
  18. scale
  19. show
  20. small
  21. stars
  22. telescope
  23. volume