![Page 1: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/1.jpg)
Making a homemade telescope
Astronomy is cool
![Page 2: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/2.jpg)
But first…
![Page 3: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/3.jpg)
What happens when black holes collide?
• Most (or all) galaxies contain supermassive blasckholes
• When two galaxies collide, blackholes– Directly collide– Spiral inward until they finally merge
• Forces are so extreme that one of them is kicked away with tremendous velocity. The other receives energy, releasing a X ray flare lasting thousands of years
• 100 collision have happened within 5 billion light years of Earth
![Page 4: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/4.jpg)
![Page 5: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/5.jpg)
![Page 6: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/6.jpg)
![Page 7: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/7.jpg)
![Page 8: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/8.jpg)
![Page 9: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/9.jpg)
![Page 10: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/10.jpg)
![Page 11: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/11.jpg)
![Page 12: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/12.jpg)
![Page 13: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/13.jpg)
![Page 14: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/14.jpg)
Lens configuration
galileo
![Page 15: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/15.jpg)
![Page 16: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/16.jpg)
Distance it takes for lens to bend light to a point
![Page 17: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/17.jpg)
• Diameter is larger, magnification smaller, focal distance larger.
• Therefore, smaller lenses would have smaller focal lengths and greater magnification.
![Page 18: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/18.jpg)
Magnification of telescope
The smallest eyepieces can be 2-4.9mm, and they have small focal lengths and great magnification
Good Refractor telescopes are LONG
![Page 19: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/19.jpg)
• 20-50 X = wide field views of extended deep sky
• 20- 100 X=deep sky observing (galaxies)• 75-200 X = Moon, planets compact objects
(globular clusters)
![Page 20: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/20.jpg)
Longest refractor telescope
![Page 21: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/21.jpg)
Is magnification all that good?
• When using high magnification (lower focal length) you’re only spreading the same lgiht over a larger area.
• You’ll get a blurry, dim image
![Page 22: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/22.jpg)
![Page 23: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/23.jpg)
![Page 24: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/24.jpg)
![Page 25: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/25.jpg)
![Page 26: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/26.jpg)
Grinding the mirror
![Page 27: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/27.jpg)
Creating parts
![Page 28: Making a homemade telescope Astronomy is cool. But first…](https://reader036.vdocuments.site/reader036/viewer/2022062409/5697bf841a28abf838c86e63/html5/thumbnails/28.jpg)