smarter telescopes topic 4: bigger...
TRANSCRIPT
![Page 1: smarter telescopes Topic 4: Bigger andthemrriddle.weebly.com/uploads/5/9/3/2/59324797/topic_4...build bigger and bigger telescopes. Bigger telescopes can help us to find new objects](https://reader034.vdocument.in/reader034/viewer/2022042521/5f5caf48e10adc2a6548f727/html5/thumbnails/1.jpg)
Topic 4: Bigger and smarter telescopes
![Page 2: smarter telescopes Topic 4: Bigger andthemrriddle.weebly.com/uploads/5/9/3/2/59324797/topic_4...build bigger and bigger telescopes. Bigger telescopes can help us to find new objects](https://reader034.vdocument.in/reader034/viewer/2022042521/5f5caf48e10adc2a6548f727/html5/thumbnails/2.jpg)
Most astronomers today use spectroscopy to examine stars and determine their composition.
In order to collect enough light though, astronomers have had to build bigger and bigger telescopes.
![Page 3: smarter telescopes Topic 4: Bigger andthemrriddle.weebly.com/uploads/5/9/3/2/59324797/topic_4...build bigger and bigger telescopes. Bigger telescopes can help us to find new objects](https://reader034.vdocument.in/reader034/viewer/2022042521/5f5caf48e10adc2a6548f727/html5/thumbnails/3.jpg)
Bigger telescopes can help us to find new objects further away.
In 1773, using newer and larger telescopes, astronomers were able to discover Uranus.
![Page 4: smarter telescopes Topic 4: Bigger andthemrriddle.weebly.com/uploads/5/9/3/2/59324797/topic_4...build bigger and bigger telescopes. Bigger telescopes can help us to find new objects](https://reader034.vdocument.in/reader034/viewer/2022042521/5f5caf48e10adc2a6548f727/html5/thumbnails/4.jpg)
Combining Telescopes
-Newer telescopes use powerful computers which can take images from two or more telescopes and combine them.
This creates the equivalent of one telescope the size of the total distance between the two.
This is called: interferometry
★★★★★★★★★★The Keck Telescope in Hawaii. Combing their images together has a resolving power that is able to distinguish each headlight on a car 800km away!
★★★★★★★★★★
![Page 5: smarter telescopes Topic 4: Bigger andthemrriddle.weebly.com/uploads/5/9/3/2/59324797/topic_4...build bigger and bigger telescopes. Bigger telescopes can help us to find new objects](https://reader034.vdocument.in/reader034/viewer/2022042521/5f5caf48e10adc2a6548f727/html5/thumbnails/5.jpg)
Adaptive Optics
The stars twinkle because Earth’s atmosphere refracts and distorts the light they produce
![Page 6: smarter telescopes Topic 4: Bigger andthemrriddle.weebly.com/uploads/5/9/3/2/59324797/topic_4...build bigger and bigger telescopes. Bigger telescopes can help us to find new objects](https://reader034.vdocument.in/reader034/viewer/2022042521/5f5caf48e10adc2a6548f727/html5/thumbnails/6.jpg)
There are two ways to fix this distortion:
1. Space telescope (ex. Hubble)
-if a telescope is above the atmosphere, then it doesn’t have to worry about the distortion caused by the moving atmosphere
![Page 7: smarter telescopes Topic 4: Bigger andthemrriddle.weebly.com/uploads/5/9/3/2/59324797/topic_4...build bigger and bigger telescopes. Bigger telescopes can help us to find new objects](https://reader034.vdocument.in/reader034/viewer/2022042521/5f5caf48e10adc2a6548f727/html5/thumbnails/7.jpg)
2. Adaptive optics
Using a computer to focus an image and make up for distortions caused by the atmosphere
![Page 8: smarter telescopes Topic 4: Bigger andthemrriddle.weebly.com/uploads/5/9/3/2/59324797/topic_4...build bigger and bigger telescopes. Bigger telescopes can help us to find new objects](https://reader034.vdocument.in/reader034/viewer/2022042521/5f5caf48e10adc2a6548f727/html5/thumbnails/8.jpg)
![Page 9: smarter telescopes Topic 4: Bigger andthemrriddle.weebly.com/uploads/5/9/3/2/59324797/topic_4...build bigger and bigger telescopes. Bigger telescopes can help us to find new objects](https://reader034.vdocument.in/reader034/viewer/2022042521/5f5caf48e10adc2a6548f727/html5/thumbnails/9.jpg)
![Page 10: smarter telescopes Topic 4: Bigger andthemrriddle.weebly.com/uploads/5/9/3/2/59324797/topic_4...build bigger and bigger telescopes. Bigger telescopes can help us to find new objects](https://reader034.vdocument.in/reader034/viewer/2022042521/5f5caf48e10adc2a6548f727/html5/thumbnails/10.jpg)
![Page 11: smarter telescopes Topic 4: Bigger andthemrriddle.weebly.com/uploads/5/9/3/2/59324797/topic_4...build bigger and bigger telescopes. Bigger telescopes can help us to find new objects](https://reader034.vdocument.in/reader034/viewer/2022042521/5f5caf48e10adc2a6548f727/html5/thumbnails/11.jpg)
Since the distance between stars is so large, we have to use different units to represent how far away everything is
We use light years (the distance light can travel in a year) and Astronomical Units (AU: The distance from the Earth to the sun)
![Page 12: smarter telescopes Topic 4: Bigger andthemrriddle.weebly.com/uploads/5/9/3/2/59324797/topic_4...build bigger and bigger telescopes. Bigger telescopes can help us to find new objects](https://reader034.vdocument.in/reader034/viewer/2022042521/5f5caf48e10adc2a6548f727/html5/thumbnails/12.jpg)
Distance to the stars:
- By using a distance you know, you can calculate an unknown distance.
One of the most common ways of doing this is called Triangulation(aka parallax technique) → The longer the baseline- the more accurate the results