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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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By Marcela Ayres
Comment LinkBRASILIA, Oct 16 (Reuters) - Brazil plans to nominate former central bank
governor Ilan Goldfajn to head the Inter-American Development Bank (IDB), a person familiar with the matter said on Sunday, as Latin America's largest economy seeks
to secure its first presidency of the institution.
The development bank will elect its next president
on Nov.
20 after the ouster of Mauricio Claver-Carone in an ethics scandal.
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Goldfajn led Brazil´s central bank under former President Michel Temer, before handing the reins to current chief
Roberto Campos Neto in February 2019.
Goldfajn was recognized for his focus on controlling inflation and efforts to reform banking regulations
that opened the door to greater competition in the Brazilian financial system.
Under Goldfajn´s tenure, the central bank began developing its Pix instant payment platform, which was launched under Campos Neto.
The platform has been a massive success in the country, winning international plaudits.
After leaving the central bank, Goldfajn chaired the board
of Credit Suisse in Brazil before joining the IMF.
During IMF meetings in Washington, Brazil´s government began drumming up support for its nominee.
Brazil is pushing the IDB, a major investor in Latin America
and the Caribbean, to finance transnational infrastructures to
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The United States, which nominated Claver-Carone, has said it will not make a new nomination. Mexico has
already announced that it plans to nominate Alicia Barcena,
the former head of the United Nation's Economic Commission for Latin America
and the Caribbean (ECLAC).
(Reporting by Marcela Ayres; editing by Brad Haynes, Chizu
Nomiyama and Lisa Shumaker)
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