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 supermassive black hole. Now, black hloes are invisible. That's why they're called that. All you can see is the deflection of the light around them, and ocasllaicnoy, when a star or a cloud of gas comes into their orbit, it is ripped apart by tidal forces, fnromig what we call an aoteiccrn disk. The accretion disk glows brghlity in the x-rays, and huge magnetic fields can launch the material into spcae 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 supermassive black hole. Now, black _____ are invisible. That's why they're called that. All you can see is the deflection of the light around them, and ____________, when a star or a cloud of gas comes into their orbit, it is ripped apart by tidal forces, _______ what we call an _________ disk. The accretion disk glows ________ in the x-rays, and huge magnetic fields can launch the material into _____ 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
- space
- brightly
- forming
- occasionally
- accretion
- holes
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
- accretion
- black
- brightly
- call
- called
- center
- cloud
- deflection
- disk
- fields
- forces
- forming
- galaxy
- gas
- glows
- hole
- holes
- huge
- invisible
- jets
- launch
- light
- magnetic
- material
- occasionally
- orbit
- pick
- producing
- radio
- ripped
- space
- speed
- star
- supermassive
- survey
- tidal
- visible