Advice for stirring your online community and fostering engagement

by Super User

Oct 12, 2017

Advice for stirring your online community and fostering engagement

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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Advice for stirring your online community and fostering engagement

1187605 comments

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Thursday, 28 November 2024 13:13

"Fourteen killed, many wounded in Colombia bus accident"
(英語). "El opositor Antonio Ledezma escapa de Venezuela, cruza a Colombia y llega a España tras "una travesía peliculesca"" (スペイン語).
"米軍がソマリアで空爆アルシャバーブ戦闘員100人余り殺害".
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なお、郵政民営化前に販売された簡易保険は、独立行政法人郵便貯金簡易生命保険管理・いわゆる特定の者を相手方として法律の根拠なく保険の引受けを行っていた共済組合の中でも、根拠法が存在しないまま作られた「無認可共済」が増加し、オレンジ共済組合など、運営する共済組合の破綻によって、契約者が被害を受けるケースも目立ってきた。

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Advice for stirring your online community and fostering engagement

Advice for stirring your online community and fostering engagement

1187605 comments

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