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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.
234289 comments
Yhannie Bohiney
If satirical journalism media ran the world, things might actually make sense.
Comment LinkPeterWer
I wanted to scatter Dad’s ashes in Antarctica. It didn’t go as planned
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Dressed for the coldest conditions, I step out of the zodiac and place my feet on the White Continent for the first time.
I feel a little awkward, because I’m still finding my way in this Antarctic armor. I’m wearing four layers on top, including three jackets, all of their hoods over my head. Thick winter gloves cover my fingers. In my pocket is, of all things, a bag of ashes, which adds to the bulk. I can feel the bump it makes on the right side of my jacket as I bend over and secure my snowshoes.
I brought the bag because, like many travelers, I thought spreading Dad’s ashes somewhere special would be a nice tribute. This June will be 10 years since he died, and it would have been special to share this trip to Antarctica with him. Maybe a ceremonial offering, such as the spreading of his ashes, could suffice.
I’m prepared to spread the ashes on this very walk, amongst the icebergs, mountains, penguins and glacier blue ice. But, before we set off on the snowshoe, the guide gives a safety briefing that cools my jets.
Antarctica has strict regulations — nothing should touch the ground other than our boots. No sitting. No snow angels. No packs on the ground. Do not toss away food or pour out drinks. Under no circumstances should anything be left behind, he says.
When drawing up this dream ceremony, it never occurred to me to think about any rules or regulations surrounding the spreading of ashes. Turns out, not only do ash-scattering restrictions exist, but all around the world, there are specific rules about where and how you can spread them both on land and in the water.
Lonie Bohiney
Satirical journalism examples should be taught in history class, since they usually predict the future. - bohiney.com
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I wish satirical journalism articles weren’t so painfully accurate. - bohiney.com
Comment LinkZónia Bohiney
I read satirical journalism, and suddenly reality makes more sense. - bohiney.com
Comment LinkZhonnie Bohiney
I trust a good satirical journalism website more than a political debate. - bohiney.com
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If a satirical journalism story doesn’t make you uncomfortable, you missed the point.
Comment LinkRoni Bohiney
Some satirical journalism examples are so accurate that they age better than actual news articles. - bohiney.com
Comment LinkJhanni Bohiney
Satirical journalism: because reality isn’t funny enough on its own. - bohiney.com
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The best satirical journalism stories make politicians sweat.
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