full transcript
"From the Ted Talk by Henry Lin: What we can learn from galaxies far, far away"

#### Unscramble the Blue Letters

So, one particular question that we have is, how does dark energy affect the universe at the largest scales? Depending on how strong it is, maybe structure forms faster or slower. Well, the problem with the large-scale structure of the universe is that it's horribly cpemoaclitd. Here is a computer simulation. And we need a way to simplify it. Well, I like to think about this using an alanogy. If I want to understand the snnkiig of the Titanic, the most important thing to do is not to model the little positions of every single little piece of the boat that broke off. The most important thing to do is to tacrk the two biggest parts. Similarly, I can learn a lot about the uenvsrie at the largest slaecs by tracking its biggest pieces and those biggest pieces are clusters of galaxies.

#### Open Cloze

So, one particular question that we have is, how does dark energy affect the universe at the largest scales? Depending on how strong it is, maybe structure forms faster or slower. Well, the problem with the large-scale structure of the universe is that it's horribly ___________. Here is a computer simulation. And we need a way to simplify it. Well, I like to think about this using an _______. If I want to understand the _______ of the Titanic, the most important thing to do is not to model the little positions of every single little piece of the boat that broke off. The most important thing to do is to _____ the two biggest parts. Similarly, I can learn a lot about the ________ at the largest ______ by tracking its biggest pieces and those biggest pieces are clusters of galaxies.

1. universe
2. analogy
3. scales
4. complicated
5. sinking
6. track

#### Original Text

So, one particular question that we have is, how does dark energy affect the universe at the largest scales? Depending on how strong it is, maybe structure forms faster or slower. Well, the problem with the large-scale structure of the universe is that it's horribly complicated. Here is a computer simulation. And we need a way to simplify it. Well, I like to think about this using an analogy. If I want to understand the sinking of the Titanic, the most important thing to do is not to model the little positions of every single little piece of the boat that broke off. The most important thing to do is to track the two biggest parts. Similarly, I can learn a lot about the universe at the largest scales by tracking its biggest pieces and those biggest pieces are clusters of galaxies.

#### ngrams of length 2

collocation frequency
galaxy clusters 8
dark matter 5
galaxy cluster 3
dark energy 3

1. affect
2. analogy
3. biggest
4. boat
5. broke
6. clusters
7. complicated
8. computer
9. dark
10. depending
11. energy
12. faster
13. forms
14. galaxies
15. horribly
16. important
17. largest
18. learn
19. lot
20. model
21. parts
22. piece
23. pieces
24. positions
25. problem
26. question
27. scales
28. similarly
29. simplify
30. simulation
31. single
32. sinking
33. slower
34. strong
35. structure
36. titanic
37. track
38. tracking
39. understand
40. universe