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When you enter into any new area of science, you almost always find
yourself with a baffling new language of technical terms to learn before you can converse with the experts. This is certainly true in astronomy both in terms of terms that refer to the cosmos and terms that describe the tools of the trade, the most prevalent being the telescope. So to get us off of first base, let’s define some of the key terms that pertain to telescopes to help you be able to talk to them more intelligently. The first area of specialization in telescopes has to do with the types of telescopes people use. The three designs of telescopes that most people use are the Refractor, the Reflector and the Schmidt Cassegrain telescope. The refractor telescope uses a convex lens to focus the light on the eyepiece. The reflector telescope has a concave lens which means it bends in. It uses mirrors to focus the image that you eventually see. The Schmidt Cassegrain telescope uses an involved system of mirrors to capture the image you want to see. A binocular telescope uses a set of telescopes mounted and synchronized so your view of the sky is 3-D. Beyond the basic types, other terms refer to parts of the telescope or to the science behind how telescopes work. Collimation is a term for how well tuned the telescope is to give you a good clear image of what you are looking at. You want your telescope to have good collimation so you are not getting a false image of the celestial body. Aperture is a fancy word for how big the lens of your telescope is. But it’s an important word because the aperture of the lens is the key to how powerful your telescope is. Magnification has nothing to do with it, its all in the aperture.
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Auction house withdraws shrunken heads and other human remains from sale following outcry
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An auction house in England has withdrawn human remains, including shrunken heads and ancestral skulls, from sale following an outcry.
The Swan auction house in Tetsworth, Oxfordshire withdrew more than two dozen lots from an upcoming auction titled “The Curious Collector Sale,” including an 18th-century Tsantsa shrunken head, which was expected to fetch ?20,000-?25,000 ($26,000-$33,000) and was previously owned by Hugh Hefner, founder of Playboy magazine.
Other withdrawn lots include an ancestral skull from the Solomon Islands, another from the Fon tribe in Benin and a double ancestor skull from Congo.
The planned sale of another piece, described as a 19th-century horned Naga human skull, drew criticism from Neiphiu Rio, Chief Minister of the Indian state of Nagaland.
Rio wrote to India’s External Affairs Minister, S. Jaishankar, asking him to intervene “to ensure that the auction of the human remains of our people is halted.”
In his letter, Rio said he had been informed about the auction by the Forum for Naga Reconciliation (FNR), a grouping of organizations that works to reconcile different Naga political groups, some of which have engaged in armed struggle for independence from India in recent decades.
In its letter to Rio, the FNR said it “condemns this inhumane and violent practice where indigenous ancestral human remains continue to be collector’s items.”
“Such auctions continue the policy of dehumanization and colonial violence on the Naga people,” it added.
Another of those to criticize the planned sale was Laura Van Broekhoven, director of the Pitt Rivers Museum, which is part of the University of Oxford.
“Please, immediately pull from tomorrow’s auction the human and ancestral remains of Naga, Shuar, Dayak, Kota, Fon, Vili people and other communities in Papua New Guinea, Solomon Islands, Nigeria, Congo, Ecuador, Nagaland, Benin,” she wrote in a post on X on Tuesday.
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