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This type of telescope is called a reflecting telescope , or reflector -LRB- see Figure 23.5 -RRB- . | TQA:T_0491_10 | 13 | see | true | see | [
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"This type of telescope is called a reflecting telescope , or reflector"
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The mirrors in a reflecting telescope are much lighter than the heavy glass lenses in a refractor . | TQA:T_0491_11 | 1 | mirrors | true | mirror | [
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"a reflecting telescope"
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The mirrors in a reflecting telescope are much lighter than the heavy glass lenses in a refractor . | TQA:T_0491_11 | 4 | reflecting | true | reflect | [
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This is important because a refracting telescope must be much stronger to support the heavy glass . | TQA:T_0491_12 | 5 | refracting | true | refract | [
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This is important because a refracting telescope must be much stronger to support the heavy glass . | TQA:T_0491_12 | 12 | support | true | support | [
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This is important because a refracting telescope must be much stronger to support the heavy glass . | TQA:T_0491_12 | 12 | support | true | support | [
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Its much easier to precisely make mirrors than to precisely make glass lenses . | TQA:T_0491_13 | 5 | make | true | make | [
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Its much easier to precisely make mirrors than to precisely make glass lenses . | TQA:T_0491_13 | 5 | make | true | make | [
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Its much easier to precisely make mirrors than to precisely make glass lenses . | TQA:T_0491_13 | 5 | make | true | make | [
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Its much easier to precisely make mirrors than to precisely make glass lenses . | TQA:T_0491_13 | 6 | mirrors | true | mirror | [
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Its much easier to precisely make mirrors than to precisely make glass lenses . | TQA:T_0491_13 | 10 | make | true | make | [
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"precisely"
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Its much easier to precisely make mirrors than to precisely make glass lenses . | TQA:T_0491_13 | 10 | make | true | make | [
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"glass lenses"
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For that reason , reflectors can be made larger than refractors . | TQA:T_0491_14 | 7 | made | true | make | [
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"larger",
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For that reason , reflectors can be made larger than refractors . | TQA:T_0491_14 | 7 | made | true | make | [
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"reflectors"
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Larger telescopes can collect more light . | TQA:T_0491_15 | 3 | collect | true | collect | [
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"Larger telescopes"
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Larger telescopes can collect more light . | TQA:T_0491_15 | 3 | collect | true | collect | [
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"more light"
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This means that they can study dimmer or more distant objects . | TQA:T_0491_16 | 1 | means | true | mean | [
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"that they can study dimmer or more distant objects"
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This means that they can study dimmer or more distant objects . | TQA:T_0491_16 | 1 | means | true | mean | [
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"This"
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This means that they can study dimmer or more distant objects . | TQA:T_0491_16 | 5 | study | true | study | [
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"dimmer or more distant objects"
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This means that they can study dimmer or more distant objects . | TQA:T_0491_16 | 5 | study | true | study | [
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"they"
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Telescopes can also be made to use both lenses and mirrors . | TQA:T_0491_18 | 4 | made | true | make | [
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"to use both lenses and mirrors"
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Telescopes can also be made to use both lenses and mirrors . | TQA:T_0491_18 | 4 | made | true | make | [
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Telescopes can also be made to use both lenses and mirrors . | TQA:T_0491_18 | 6 | use | true | use | [
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"both lenses and mirrors"
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Telescopes can also be made to use both lenses and mirrors . | TQA:T_0491_18 | 6 | use | true | use | [
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"Telescopes"
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Telescopes can also be made to use both lenses and mirrors . | TQA:T_0491_18 | 10 | mirrors | true | mirror | [
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For more on how telescopes were developed , visit http://galileo.rice.edu/sci/instruments/telescope.html . | TQA:T_0491_19 | 6 | developed | true | develop | [
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His telescope used two lenses to make distant objects appear both nearer and larger . | TQA:T_0491_2 | 2 | used | true | use | [
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"to make distant objects appear both nearer and larger"
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His telescope used two lenses to make distant objects appear both nearer and larger . | TQA:T_0491_2 | 2 | used | true | use | [
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His telescope used two lenses to make distant objects appear both nearer and larger . | TQA:T_0491_2 | 2 | used | true | use | [
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His telescope used two lenses to make distant objects appear both nearer and larger . | TQA:T_0491_2 | 6 | make | true | make | [
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"distant objects",
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His telescope used two lenses to make distant objects appear both nearer and larger . | TQA:T_0491_2 | 6 | make | true | make | [
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"two lenses"
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His telescope used two lenses to make distant objects appear both nearer and larger . | TQA:T_0491_2 | 9 | appear | true | appear | [
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His telescope used two lenses to make distant objects appear both nearer and larger . | TQA:T_0491_2 | 9 | appear | true | appear | [
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"distant objects"
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Telescopes that use lenses to bend light are called refracting telescopes , or refractors -LRB- Figure 23.4 -RRB- . | TQA:T_0491_3 | 2 | use | true | use | [
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"lenses"
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Telescopes that use lenses to bend light are called refracting telescopes , or refractors -LRB- Figure 23.4 -RRB- . | TQA:T_0491_3 | 2 | use | true | use | [
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"Telescopes"
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[
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Telescopes that use lenses to bend light are called refracting telescopes , or refractors -LRB- Figure 23.4 -RRB- . | TQA:T_0491_3 | 2 | use | true | use | [
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"to bend light",
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Telescopes that use lenses to bend light are called refracting telescopes , or refractors -LRB- Figure 23.4 -RRB- . | TQA:T_0491_3 | 5 | bend | true | bend | [
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Telescopes that use lenses to bend light are called refracting telescopes , or refractors -LRB- Figure 23.4 -RRB- . | TQA:T_0491_3 | 5 | bend | true | bend | [
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"Telescopes",
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Telescopes that use lenses to bend light are called refracting telescopes , or refractors -LRB- Figure 23.4 -RRB- . | TQA:T_0491_3 | 5 | bend | true | bend | [
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"light"
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[
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Telescopes that use lenses to bend light are called refracting telescopes , or refractors -LRB- Figure 23.4 -RRB- . | TQA:T_0491_3 | 8 | called | true | call | [
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"Telescopes",
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Telescopes that use lenses to bend light are called refracting telescopes , or refractors -LRB- Figure 23.4 -RRB- . | TQA:T_0491_3 | 8 | called | true | call | [
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"refractors",
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Telescopes that use lenses to bend light are called refracting telescopes , or refractors -LRB- Figure 23.4 -RRB- . | TQA:T_0491_3 | 8 | called | true | call | [
"why",
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"something",
"called",
"something",
"_",
"_",
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] | [
"use lenses to bend light"
] | [
[
2,
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Telescopes that use lenses to bend light are called refracting telescopes , or refractors -LRB- Figure 23.4 -RRB- . | TQA:T_0491_3 | 9 | refracting | true | refract | [
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"Telescopes",
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Many amateur astronomers still use refractors today . | TQA:T_0491_5 | 4 | use | true | use | [
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"refractors"
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Many amateur astronomers still use refractors today . | TQA:T_0491_5 | 4 | use | true | use | [
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"today"
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Many amateur astronomers still use refractors today . | TQA:T_0491_5 | 4 | use | true | use | [
"who",
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"Many amateur astronomers",
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Refractors are good for viewing details within our solar system . | TQA:T_0491_6 | 4 | viewing | true | view | [
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] | [
"details"
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Refractors are good for viewing details within our solar system . | TQA:T_0491_6 | 4 | viewing | true | view | [
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"within",
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] | [
"our solar system"
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[
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Around 1670 , Sir Isaac Newton built a different kind of telescope . | TQA:T_0491_8 | 6 | built | true | build | [
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"_",
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] | [
"a different kind of telescope"
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[
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Around 1670 , Sir Isaac Newton built a different kind of telescope . | TQA:T_0491_8 | 6 | built | true | build | [
"when",
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"Around 1670"
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[
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Around 1670 , Sir Isaac Newton built a different kind of telescope . | TQA:T_0491_8 | 6 | built | true | build | [
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] | [
"Sir Isaac Newton"
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[
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Newtons telescope used curved mirrors instead of lenses to focus light . | TQA:T_0491_9 | 2 | used | true | use | [
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"focus light",
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Newtons telescope used curved mirrors instead of lenses to focus light . | TQA:T_0491_9 | 2 | used | true | use | [
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"_",
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] | [
"mirrors",
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Newtons telescope used curved mirrors instead of lenses to focus light . | TQA:T_0491_9 | 2 | used | true | use | [
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"_",
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] | [
"lenses"
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[
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Newtons telescope used curved mirrors instead of lenses to focus light . | TQA:T_0491_9 | 2 | used | true | use | [
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"Newtons telescope",
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Newtons telescope used curved mirrors instead of lenses to focus light . | TQA:T_0491_9 | 4 | mirrors | true | mirror | [
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"_",
"_",
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] | [
"light"
] | [
[
10,
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Newtons telescope used curved mirrors instead of lenses to focus light . | TQA:T_0491_9 | 4 | mirrors | true | mirror | [
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"Newtons telescope",
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Newtons telescope used curved mirrors instead of lenses to focus light . | TQA:T_0491_9 | 4 | mirrors | true | mirror | [
"who",
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"mirrored",
"something",
"_",
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"?"
] | [
"Newtons"
] | [
[
0,
1
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Newtons telescope used curved mirrors instead of lenses to focus light . | TQA:T_0491_9 | 9 | focus | true | focus | [
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"_",
"_",
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] | [
"light"
] | [
[
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Newtons telescope used curved mirrors instead of lenses to focus light . | TQA:T_0491_9 | 9 | focus | true | focus | [
"what",
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"_",
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"mirrors",
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Radio telescopes collect radio waves . | TQA:T_0492_0 | 2 | collect | true | collect | [
"what",
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"something",
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] | [
"Radio telescopes"
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[
0,
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Radio telescopes collect radio waves . | TQA:T_0492_0 | 2 | collect | true | collect | [
"what",
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"_",
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] | [
"radio waves"
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[
3,
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A group of radio telescopes can be linked together with a computer . | TQA:T_0492_10 | 7 | linked | true | link | [
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] | [
"together"
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[
8,
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A group of radio telescopes can be linked together with a computer . | TQA:T_0492_10 | 7 | linked | true | link | [
"what",
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] | [
"A group of radio telescopes"
] | [
[
0,
5
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A group of radio telescopes can be linked together with a computer . | TQA:T_0492_10 | 7 | linked | true | link | [
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"_",
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] | [
"with a computer",
"a computer"
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[
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The telescopes observe the same object . | TQA:T_0492_11 | 2 | observe | true | observe | [
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"_",
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"the same object"
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[
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The telescopes observe the same object . | TQA:T_0492_11 | 2 | observe | true | observe | [
"what",
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"The telescopes",
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The computer then combines the data from each telescope . | TQA:T_0492_12 | 3 | combines | true | combine | [
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] | [
"The computer"
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[
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The computer then combines the data from each telescope . | TQA:T_0492_12 | 3 | combines | true | combine | [
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"the data",
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The computer then combines the data from each telescope . | TQA:T_0492_12 | 3 | combines | true | combine | [
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"_",
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] | [
"each telescope"
] | [
[
7,
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]
] |
The computer then combines the data from each telescope . | TQA:T_0492_12 | 3 | combines | true | combine | [
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"something",
"?"
] | [
"then"
] | [
[
2,
3
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] |
This makes the group function like one single telescope . | TQA:T_0492_13 | 1 | makes | true | make | [
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"make",
"_",
"_",
"_",
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] | [
"the group function like one single telescope",
"group function like one single telescope"
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[
2,
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[
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This makes the group function like one single telescope . | TQA:T_0492_13 | 1 | makes | true | make | [
"what",
"_",
"_",
"makes",
"something",
"_",
"_",
"?"
] | [
"This"
] | [
[
0,
1
]
] |
An example is shown in Figure 23.7 . | TQA:T_0492_14 | 3 | shown | true | show | [
"what",
"is",
"_",
"shown",
"_",
"_",
"somewhere",
"?"
] | [
"An example"
] | [
[
0,
2
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] |
An example is shown in Figure 23.7 . | TQA:T_0492_14 | 3 | shown | true | show | [
"where",
"is",
"something",
"shown",
"_",
"_",
"_",
"?"
] | [
"in Figure 23.7"
] | [
[
4,
7
]
] |
To learn more about radio telescopes and radio astronomy in general , go to | TQA:T_0492_15 | 1 | learn | true | learn | [
"what",
"does",
"someone",
"learn",
"_",
"about",
"_",
"?"
] | [
"radio telescopes and radio astronomy",
"radio telescopes",
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[
4,
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[
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],
[
7,
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],
[
3,
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]
] |
To learn more about radio telescopes and radio astronomy in general , go to | TQA:T_0492_15 | 12 | go | true | go | [
"where",
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"someone",
"go",
"_",
"_",
"_",
"?"
] | [
"to"
] | [
[
13,
14
]
] |
To learn more about radio telescopes and radio astronomy in general , go to | TQA:T_0492_15 | 12 | go | true | go | [
"why",
"does",
"someone",
"go",
"_",
"_",
"_",
"?"
] | [
"To learn more about radio telescopes and radio astronomy",
"To learn more about radio telescopes and radio astronomy in general"
] | [
[
0,
9
],
[
0,
11
]
] |
Radio telescopes look a lot like satellite dishes . | TQA:T_0492_2 | 2 | look | true | look | [
"what",
"does",
"something",
"look",
"_",
"as",
"something",
"?"
] | [
"satellite dishes",
"like satellite dishes"
] | [
[
6,
8
],
[
5,
8
]
] |
Radio telescopes look a lot like satellite dishes . | TQA:T_0492_2 | 2 | look | true | look | [
"what",
"_",
"_",
"looks",
"_",
"_",
"_",
"?"
] | [
"Radio telescopes"
] | [
[
0,
2
]
] |
In fact , both are designed to collect and focus radio waves or microwaves from space . | TQA:T_0492_3 | 5 | designed | true | design | [
"what",
"is",
"_",
"designed",
"_",
"_",
"to do something",
"?"
] | [
"both"
] | [
[
3,
4
]
] |
In fact , both are designed to collect and focus radio waves or microwaves from space . | TQA:T_0492_3 | 5 | designed | true | design | [
"what",
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"something",
"designed",
"_",
"_",
"to do",
"?"
] | [
"collect and focus radio waves or microwaves from space",
"to collect and focus radio waves or microwaves from space"
] | [
[
7,
16
],
[
6,
16
]
] |
In fact , both are designed to collect and focus radio waves or microwaves from space . | TQA:T_0492_3 | 7 | collect | true | collect | [
"what",
"is",
"_",
"collected",
"_",
"_",
"_",
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] | [
"microwaves",
"radio waves",
"radio waves or microwaves"
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[
13,
14
],
[
10,
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],
[
10,
14
]
] |
In fact , both are designed to collect and focus radio waves or microwaves from space . | TQA:T_0492_3 | 7 | collect | true | collect | [
"where",
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"something",
"collected",
"_",
"from",
"_",
"?"
] | [
"space",
"from space"
] | [
[
15,
16
],
[
14,
16
]
] |
In fact , both are designed to collect and focus radio waves or microwaves from space . | TQA:T_0492_3 | 9 | focus | true | focus | [
"what",
"is",
"_",
"focused",
"_",
"_",
"_",
"?"
] | [
"radio waves",
"radio waves or microwaves"
] | [
[
10,
12
],
[
10,
14
]
] |
The largest single radio telescope in the world is at the Arecibo Observatory in Puerto Rico -LRB- see Figure 23.6 -RRB- . | TQA:T_0492_4 | 17 | see | true | see | [
"what",
"is",
"_",
"seen",
"_",
"_",
"_",
"?"
] | [
"The largest single radio telescope in the world",
"Figure 23.6"
] | [
[
0,
8
],
[
18,
20
]
] |
The sinkhole formed when water flowing underground dissolved the limestone . | TQA:T_0492_6 | 2 | formed | true | form | [
"what",
"was",
"_",
"formed",
"_",
"_",
"_",
"?"
] | [
"The sinkhole"
] | [
[
0,
2
]
] |
The sinkhole formed when water flowing underground dissolved the limestone . | TQA:T_0492_6 | 2 | formed | true | form | [
"when",
"was",
"something",
"formed",
"_",
"_",
"_",
"?"
] | [
"water flowing underground dissolved the limestone",
"when water flowing underground dissolved the limestone"
] | [
[
4,
10
],
[
3,
10
]
] |
The sinkhole formed when water flowing underground dissolved the limestone . | TQA:T_0492_6 | 5 | flowing | true | flow | [
"what",
"_",
"_",
"flows",
"_",
"_",
"_",
"?"
] | [
"water"
] | [
[
4,
5
]
] |
The sinkhole formed when water flowing underground dissolved the limestone . | TQA:T_0492_6 | 5 | flowing | true | flow | [
"where",
"does",
"something",
"flow",
"_",
"_",
"_",
"?"
] | [
"underground"
] | [
[
6,
7
]
] |
The sinkhole formed when water flowing underground dissolved the limestone . | TQA:T_0492_6 | 7 | dissolved | true | dissolve | [
"how",
"is",
"something",
"dissolved",
"_",
"_",
"somewhere",
"?"
] | [
"water flowing"
] | [
[
4,
6
]
] |
The sinkhole formed when water flowing underground dissolved the limestone . | TQA:T_0492_6 | 7 | dissolved | true | dissolve | [
"what",
"is",
"_",
"dissolved",
"_",
"_",
"_",
"?"
] | [
"limestone",
"sinkhole",
"the limestone"
] | [
[
9,
10
],
[
1,
2
],
[
8,
10
]
] |
The sinkhole formed when water flowing underground dissolved the limestone . | TQA:T_0492_6 | 7 | dissolved | true | dissolve | [
"what",
"is",
"something",
"dissolved",
"_",
"to",
"_",
"?"
] | [
"limestone",
"sinkhole formed"
] | [
[
9,
10
],
[
1,
3
]
] |
The sinkhole formed when water flowing underground dissolved the limestone . | TQA:T_0492_6 | 7 | dissolved | true | dissolve | [
"where",
"is",
"something",
"dissolved",
"_",
"_",
"_",
"?"
] | [
"underground"
] | [
[
6,
7
]
] |
This telescope would collapse under its own weight if it were not supported by the ground . | TQA:T_0492_7 | 3 | collapse | true | collapse | [
"what",
"would",
"_",
"collapse",
"_",
"_",
"_",
"?"
] | [
"This telescope",
"telescope"
] | [
[
0,
2
],
[
1,
2
]
] |
This telescope would collapse under its own weight if it were not supported by the ground . | TQA:T_0492_7 | 3 | collapse | true | collapse | [
"where",
"would",
"something",
"collapse",
"_",
"_",
"_",
"?"
] | [
"under its own weight",
"the ground"
] | [
[
4,
8
],
[
14,
16
]
] |
This telescope would collapse under its own weight if it were not supported by the ground . | TQA:T_0492_7 | 3 | collapse | true | collapse | [
"why",
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"something",
"collapse",
"_",
"_",
"somewhere",
"?"
] | [
"if it were not supported",
"if it were not supported by the ground",
"not supported by the ground",
"its own weight"
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[
8,
13
],
[
8,
16
],
[
11,
16
],
[
5,
8
]
] |
This telescope would collapse under its own weight if it were not supported by the ground . | TQA:T_0492_7 | 12 | supported | true | support | [
"what",
"is",
"something",
"supported",
"_",
"by",
"_",
"?"
] | [
"by the ground",
"the ground"
] | [
[
13,
16
],
[
14,
16
]
] |
This telescope would collapse under its own weight if it were not supported by the ground . | TQA:T_0492_7 | 12 | supported | true | support | [
"what",
"is",
"_",
"supported",
"_",
"_",
"_",
"?"
] | [
"This telescope",
"telescope"
] | [
[
0,
2
],
[
1,
2
]
] |
The telescope can only observe the part of the sky that happens to be overhead at a given time . | TQA:T_0492_9 | 4 | observe | true | observe | [
"what",
"_",
"_",
"observes",
"_",
"_",
"_",
"?"
] | [
"The telescope"
] | [
[
0,
2
]
] |
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