blindsight

blindsight t1_j2ca5qt wrote

To add to the last bit: part of the post processing is taking advantage of the fact that celestial objects move so slowly they might as well be static.

Now, when cameras take pictures, sometimes there are tiny "blips" in the photo (for a myriad of reasons) which creates noise in the photo (slight colour irregularities; you'll see a lot of noise in low-light photography with your cell phone, for example).

But since objects in space don't really move at all over days/weeks/months/years (depending on what we're talking about) you can take as many photos as you want.

Aside: Even crazy long exposure photographs. With a computerized motor that matches the rotation of the Earth, you can take photos with exposure times of hours.

Then you put all those images into computer software that compares them all. If most of the images agree on a pixel, then it's probably "correct", so any "blips" of noise can be eliminated (or at least drastically reduced).

You can also use different lenses and filters to only look at specific frequencies of light one by one, then combine them all using computers. And do all the exposure and stacking techniques above to make the individual spectrums more clear.

Combine the above, and you can get incredibly clear photos, even with a backyard telescope (with the right tools and a lot of patience!)

Another thing I didn't see above is using multiple radio telescopes that are very far apart. Looking at some lower frequencies of electromagnetic radiation, they can effectively combine their images to make a "virtual" telescope that's way bigger than they are.

1

blindsight t1_izl82ym wrote

Yeah, stenography is a whole other thing.

I can type ~95 WPM with high accuracy when I'm focusing; this is enough that I'm able to keep up with the main ideas that need to be recorded in meeting minutes (and similar reporting/tracking documents), but definitely not word-for-word transcription.

To keep up with spoken language, you either need to learn stenography or slow down an audio recording. Or limit people to talk more slowly, lol.

2

blindsight t1_izl4i46 wrote

40+ with 97% accuracy is basic competency. Should be enough for most jobs.

70+ with 98% accuracy is proficient. It's a good target for any work that requires significant communication by email or report writing.

100+ with 99% accuracy is an attainable target with intentional practice. It's a good target for taking minutes and other jobs that require typing "live".

2