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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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Sean Combs smiles slightly while wearing a tuxedo.
Sean Combs helped bring hip-hop to the masses as an executive and artist.Credit...Doug Peters/STAR MAX, via Associated Press
Ben SisarioJulia Jacobs
By Ben Sisario and Julia Jacobs
Sept. 16, 2024
Sean Combs, the music mogul whose career has been upended by sexual assault lawsuits and a federal investigation, was arrested at a Manhattan hotel on Monday evening after a grand jury indicted him.
The indictment is sealed and the charges were not announced but Marc Agnifilo, a lawyer for Mr. Combs, said he believed he was being charged with racketeering and sex trafficking.
A statement from Mr. Combs’s legal team said they were disappointed with the decision to prosecute him and noted that he had been cooperative with the investigation and had “voluntarily relocated to New York last week in anticipation of these charges.”
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“Sean ‘Diddy’ Combs is a music icon, self-made entrepreneur, loving family man, and proven philanthropist who has spent the last 30 years building an empire, adoring his children, and working to uplift the Black community,” the statement said. “He is an imperfect person but he is not a criminal.”
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