full transcript

From the Ted Talk by Natasha Hurley-Walker: How radio telescopes show us unseen galaxies

Unscramble the Blue Letters

What's going on? What's producing these jets? At the center of every galaxy that we know about is a ssasrviumpee black hole. Now, balck holes are invisible. That's why they're cleald that. All you can see is the dicelteofn of the light around them, and occasionally, when a star or a cloud of gas comes into their orbit, it is ripped apart by tidal ferocs, forming what we call an accretion disk. The accretion disk glows brightly in the x-rays, and huge magnetic fields can launch the maeitral into space at nearly the speed of light. So these jets are visible in the radio and this is what we pick up in our survey.

Open Cloze

What's going on? What's producing these jets? At the center of every galaxy that we know about is a ____________ black hole. Now, _____ holes are invisible. That's why they're ______ that. All you can see is the __________ of the light around them, and occasionally, when a star or a cloud of gas comes into their orbit, it is ripped apart by tidal ______, forming what we call an accretion disk. The accretion disk glows brightly in the x-rays, and huge magnetic fields can launch the ________ into space at nearly the speed of light. So these jets are visible in the radio and this is what we pick up in our survey.

Solution

  1. material
  2. called
  3. forces
  4. black
  5. supermassive
  6. deflection

Original Text

What's going on? What's producing these jets? At the center of every galaxy that we know about is a supermassive black hole. Now, black holes are invisible. That's why they're called that. All you can see is the deflection of the light around them, and occasionally, when a star or a cloud of gas comes into their orbit, it is ripped apart by tidal forces, forming what we call an accretion disk. The accretion disk glows brightly in the x-rays, and huge magnetic fields can launch the material into space at nearly the speed of light. So these jets are visible in the radio and this is what we pick up in our survey.

Frequently Occurring Word Combinations

ngrams of length 2

collocation frequency
visible light 3
radio telescope 3
supermassive black 3
radio galaxies 3
hubble deep 2
dust stops 2
objects moving 2
light waves 2
magnetic fields 2
radio telescopes 2
color view 2
false color 2
blue dots 2
supernova remnants 2
black hole 2
black holes 2
accretion disk 2
radio galaxy 2
thousand times 2

ngrams of length 3

collocation frequency
supermassive black hole 2

Important Words

  1. accretion
  2. black
  3. brightly
  4. call
  5. called
  6. center
  7. cloud
  8. deflection
  9. disk
  10. fields
  11. forces
  12. forming
  13. galaxy
  14. gas
  15. glows
  16. hole
  17. holes
  18. huge
  19. invisible
  20. jets
  21. launch
  22. light
  23. magnetic
  24. material
  25. occasionally
  26. orbit
  27. pick
  28. producing
  29. radio
  30. ripped
  31. space
  32. speed
  33. star
  34. supermassive
  35. survey
  36. tidal
  37. visible