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

Unscramble the Blue Letters

Now, that's not all. I've eolrxepd the furthest raehces of the galaxy with this survey, but there's something even more in this image. Now, I'll take you right back to the dawn of time. When the universe formed, it was a big bang, which left the universe as a sea of hydrogen, neutral hydrogen. And when the very first stars and galaxies switched on, they ionized that hydrogen. So the uvirnsee went from neutral to ionized. That imprinted a signal all around us. Everywhere, it pervades us, like the Force. Now, because that happened so long ago, the signal was refsthdied, so now that signal is at very low fcqereuneis. It's at the same frequency as my suevry, but it's so faint. It's a btilniolh the size of any of the obcjets in my survey. So our telescope may not be quite sensitive enough to pick up this signal. However, there's a new radio telescope. So I can't have a starship, but I can hopefully have one of the biggest rdaio telescopes in the world. We're building the srauqe Kilometre aarry, a new radio telescope, and it's going to be a thousand times bigger than the MWA, a thousand times more sensitive, and have an even better resolution. So we should find tens of millions of galaxies. And perhaps, deep in that signal, I will get to look upon the very first stars and galaxies schiinwtg on, the beginning of time itself.

Open Cloze

Now, that's not all. I've ________ the furthest _______ of the galaxy with this survey, but there's something even more in this image. Now, I'll take you right back to the dawn of time. When the universe formed, it was a big bang, which left the universe as a sea of hydrogen, neutral hydrogen. And when the very first stars and galaxies switched on, they ionized that hydrogen. So the ________ went from neutral to ionized. That imprinted a signal all around us. Everywhere, it pervades us, like the Force. Now, because that happened so long ago, the signal was __________, so now that signal is at very low ___________. It's at the same frequency as my ______, but it's so faint. It's a _________ the size of any of the _______ in my survey. So our telescope may not be quite sensitive enough to pick up this signal. However, there's a new radio telescope. So I can't have a starship, but I can hopefully have one of the biggest _____ telescopes in the world. We're building the ______ Kilometre _____, a new radio telescope, and it's going to be a thousand times bigger than the MWA, a thousand times more sensitive, and have an even better resolution. So we should find tens of millions of galaxies. And perhaps, deep in that signal, I will get to look upon the very first stars and galaxies _________ on, the beginning of time itself.

Solution

  1. universe
  2. billionth
  3. reaches
  4. array
  5. radio
  6. redshifted
  7. explored
  8. switching
  9. square
  10. survey
  11. objects
  12. frequencies

Original Text

Now, that's not all. I've explored the furthest reaches of the galaxy with this survey, but there's something even more in this image. Now, I'll take you right back to the dawn of time. When the universe formed, it was a big bang, which left the universe as a sea of hydrogen, neutral hydrogen. And when the very first stars and galaxies switched on, they ionized that hydrogen. So the universe went from neutral to ionized. That imprinted a signal all around us. Everywhere, it pervades us, like the Force. Now, because that happened so long ago, the signal was redshifted, so now that signal is at very low frequencies. It's at the same frequency as my survey, but it's so faint. It's a billionth the size of any of the objects in my survey. So our telescope may not be quite sensitive enough to pick up this signal. However, there's a new radio telescope. So I can't have a starship, but I can hopefully have one of the biggest radio telescopes in the world. We're building the Square Kilometre Array, a new radio telescope, and it's going to be a thousand times bigger than the MWA, a thousand times more sensitive, and have an even better resolution. So we should find tens of millions of galaxies. And perhaps, deep in that signal, I will get to look upon the very first stars and galaxies switching on, the beginning of time itself.

ngrams of length 2

collocation frequency
radio telescope 5
supernova remnants 4
radio galaxy 3
radio galaxies 3
supermassive black 3
visible light 3
synchrotron radiation 3

Important Words

  1. array
  2. bang
  3. beginning
  4. big
  5. bigger
  6. biggest
  7. billionth
  8. building
  9. dawn
  10. deep
  11. explored
  12. faint
  13. find
  14. force
  15. formed
  16. frequencies
  17. frequency
  18. furthest
  19. galaxies
  20. galaxy
  21. happened
  22. hydrogen
  23. image
  24. imprinted
  25. ionized
  26. kilometre
  27. left
  28. long
  29. millions
  30. mwa
  31. neutral
  32. objects
  33. pervades
  34. pick
  35. radio
  36. reaches
  37. redshifted
  38. resolution
  39. sea
  40. sensitive
  41. signal
  42. size
  43. square
  44. stars
  45. starship
  46. survey
  47. switched
  48. switching
  49. telescope
  50. telescopes
  51. tens
  52. thousand
  53. time
  54. times
  55. universe
  56. world