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Showing content with the highest reputation on 02/13/21 in Posts

  1. Boydstun

    Form v. Matter

    George Walsh - “If you talk about the glass merely in terms of the macroscopic level, then don’t you need some concept of ‘dispositions’?” Rand - “In what way? How?” Walsh - “Because the glass is not acting now, it’s not breaking into pieces.” Peikoff - “Well, what’s wrong with the Aristotelian concept of ‘potentiality’? An entity has the capacity to act because of its nature.” Walsh - “Well, the reason I was bringing this up was because I thought you rejected the concept of ‘potentiality’.” Rand - “No. . . .” Walsh - “I have memory or a misremembrance of someone saying that Objectivism does not accept the Aristotelian concept of ‘potentiality’.” Rand - “Specifically, that wasn’t me. Unless it was in some context of what Aristotle makes of it, as in regard to his matter-form dichotomy.” ITOE Appendix 285-86 ~~~~~~~~~~~~ A good help on the Aristotelian metaphysical distinction in being between matter and form is here.
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  2. [7] That's an important reward for me: revisiting the paths of the pioneers. Jupiter and Galileo are top of the list there. But very many other sites are out there if you read the histories and follow the skies. [1] [2] Your Bushnell 50mm x 1200 mm is a good beginner scope. It does take work getting used to them, no different than shooting a rifle or handgun, or shooting pool or bowling for that matter. Do you remember learning how to drive a car? I have a 10-inch x 2500 mm telescope in the garage on loan from my local club -- an option you might consider -- and it is going back to the equipment chair tomorrow. It weighs 65 lbs to my 68 kg and it's a bear to haul out and set up. My "everyday carry" is a 102mm (4 inch) that I can lift with one hand and carry with two. I also have a 70 mm x 700 mm National Geographic. Like your Bushnell, it is a bit smallish for some things, but it works great for most. Give your telescope some time. Use it. [3] That's how they work. You may find that paying about $500 to $1000 for a larger telescope with a motor drive is more to your liking. The big 10-inch above was available because the tracking computer was blown out (vintage 1995) and no one wanted to use it and I did not care because I can do my own tracking. [4] Your telescope could have come with three lenses: 25, 10, and 6 plus a 2x Barlow. Saturn's rings should have been clearly visible in the 25. The 10 would put you right there in person. The 6 would be poor viewing for reasons of physical optics. The 25 and 2x would be a nice compromise. If you take your time with the focus you should get a sharp view, not a smudge. But it will be small, not Neil deGrasse Tyson on PBS zooming through the rings. Mars is even smaller. But - as a matter of objective epistemology - we understand our perception in the brain and the mind, not just the sensory organs. So, if you give it five minutes, you might be surprised at what you can see. [5] I brought binoculars. [6] See [7] above. Before i go outside, I make a plan and I often pause to give credit to the people of 1700 or 1750 who first saw this or that. Galileo also was the first to record about 30 stars in what had been the 7 stars of The Manger in Cancer. We call it The Beehive Nebula today. Your telescope will do that for you. Right now, you can check out the Orion Nebula. Galileo seems to have missed it because of the narrow view of his telescopes. If nothing else, look at the Moon. Get used to that with your array of oculars ("eyepieces"). And keep them. You can used them with your next telescope. Between Galileo and about 1870 or so, most of the viewing was in small telescopes within the budget of a dedicated hobbyist. In 1847 Maria Mitchell of Nantucket was awarded a gold medal by the King of Denmark for being the first person to identify with a telescope a comet that was not seen naked eye. Her scope was about the same size as yours, 3 inches for hers. I mean for $6,000 to $10,000 you can own an instrument that would have been beyond most universities 50 years ago and just about all of them 100 years ago. And those are very small dollars now. For about a tenth of that, like $500 to $1000 you will cross into the median range of hobby scopes. My 102mm cost under $300 and I am very happy with it. It is a voyage of discovery. You have to leave the shoreline.
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  3. Alas, the world stage draws back the curtains to rebrand a player whose true identity is to be grist into its new identity: The Pearl Milling Company. I suppose if a pearl necklace is to be formed, milling holes in them is a prerequisite to stringing them along. In this case, the pearls ought be judged by the company they keep. Meanwhile, I'll stick with adding grade a eggs and milk before whipping things up for a few stirring moments while the griddle heats up for the occasion.
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  4. I took my girlfriend to the mountains to see Neowise. We saw it with the naked eye and through binoculars. She even got a decent photo of it with her phone's camera. Sometimes I watch Bob the Science Guy on YouTube. He does amateur astronomy and posted an educational video on Neowise. He even mentions the sort of professional-amateur collaboration that was done with data from the NEOWISE space telescope to find new objects and create maps.
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  5. I selected a Bushnell 18-1561 as a gift option for 10 years of service. Shortly after receiving it, Jupiter and Saturn were available for viewing prior to midnight's. After considerable effort, the telescope was aligned to take in my first personal sight of 4 of the moons of Jupiter. My disappointment came shortly thereafter with the need to re-align the instrument every 2 minutes to maintain an active view. Not long thereafter, Saturn was available for viewing. The "smudge" I was rewarded with came with the realization that to pursue the activity in any meaningful way would require a better telescope equipped with tracking capacity. I tried sighting the recent comet NEOWISE by heading a bit north to a darkened vantage point. I had not brought the telescope, being informed that I would be able to see it by the unaided eye. Alas, it was not to be for me. I treasure having seen the moons of Jupiter. After reading of Galileo's memoirs of the same, it gave his report substantially more body, having shared the experience.
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