ramriot
ramriot t1_izhmn8f wrote
Well apart from mapping the stellar distributions locally to get an idea of depth & feature of nearby arms the key way to get an overall idea if our galaxies shape is via radio observations if the neutral hydrogen emission line.
This emission line from hydrogen at a wavelength if 21cm can be plotted across the sky with variances in the frequency denoting relative velocity. combining this with models of the orbital velocity of matter in our galaxies helps in ascribing the emission to actual hydrogen clouds across the galaxy & thus builds up an overall map of matter distribution.
ramriot t1_iyzwb6x wrote
r/savedyouaclick "tried to sell"
ramriot t1_iyf2ms9 wrote
Reply to comment by Scottland83 in TIL The inventor of the television was a 15 year old farm boy who got the idea for scanning an image in rows from the back and forth motion of plowing a field. by chapstickninja
Certainly the pantelegraph of the 1860's was conceptually a scanning device to output a serial transmission. One could argue by the same logic that taking words in lines on a page, converting & transmitting them as telegraph code serially & assembling the output back into words on a page is the same concept, something Morse & others were doing in the 1840's.
In the end all discovery is seeing a little further by standing on the shoulders of giants. Which means we acknowledge what went before but also acknowledge the thing that makes something patentable i.e.
- Patentable subject matter, i.e., a kind of subject-matter eligible for patent protection
- Novel (i.e. at least some aspect of it must be new)
- Non-obvious (in United States patent law) or involve an inventive step (in European patent law)
- Useful (in U.S. patent law) or be susceptible of industrial application (in European patent law[1])
ramriot t1_iyf05al wrote
Reply to comment by herbw in TIL The inventor of the television was a 15 year old farm boy who got the idea for scanning an image in rows from the back and forth motion of plowing a field. by chapstickninja
Actually I'd deny Edison the electric light because he was never the first or even the 10th person to demonstrate the technology & he purchased several patents from others on his way to his "invention" . I will give him that he commercialised an integrated power distribution & lighting system (although it was DC).
Going back to the phonograph, that he perhaps was the first. I used that as a demonstration of the absurdity of calling Farnsworth the inventor of television when he clearly was not the 1st, given that his idea had more legs.
ramriot t1_iye6a14 wrote
Reply to comment by Scottland83 in TIL The inventor of the television was a 15 year old farm boy who got the idea for scanning an image in rows from the back and forth motion of plowing a field. by chapstickninja
With synchronized pendulum clocks that could perhaps produce a single halftone document copy in perhaps 10 minutes. Bit of a far cry from producing & transmitting 15-25 greyscale images a second.
ramriot t1_iye5rs5 wrote
Reply to comment by deandean1125 in TIL The inventor of the television was a 15 year old farm boy who got the idea for scanning an image in rows from the back and forth motion of plowing a field. by chapstickninja
Then we need to remove Thomas Edison from so many inventions because his invention was not something that could be long term commercialised. For example his phonograph was a cylinder that could not be duplicated like the disc recording system derived at Bell's Volta Labs.
ramriot t1_iye4x6y wrote
There is a larger size, specifically for grease filtering ( 10" diameter ) that I use in making maple syrup as liners to extend the useful life of my final stage micropore & wool filters. These can be purchased from catering supply stores for well under $1 each.
ramriot t1_iydckgh wrote
Reply to comment by BailoutBill in TIL The inventor of the television was a 15 year old farm boy who got the idea for scanning an image in rows from the back and forth motion of plowing a field. by chapstickninja
They both used a scanning line technique for camera & display. The key difference as I understand was that Biard's system was electromechanical while Farnsworth's was an all-electronic system. Baird was admittedly 1st, Farnsworth produced 2d something possibly independently that was more commercial & open to ongoing improvement.
If we follow the same logic for say the Phonograph then we acknowledge Edison for the cylinder phonograph but call Bell's Volta Laboratory the inventor of the modern disc phonograph.
ramriot t1_iydajp4 wrote
Reply to TIL The inventor of the television was a 15 year old farm boy who got the idea for scanning an image in rows from the back and forth motion of plowing a field. by chapstickninja
I thought he was a Scottish inventor, electrical engineer, and innovator
https://en.wikipedia.org/wiki/John_Logie_Baird
ramriot t1_iybip71 wrote
Reply to TIL that beans are banned in Spacecraft because they can produce "1-3 cups of flatus" in an environment where there are no windows by April_Spring_1982
Well, strictly there are windows but they are designed to be very difficult to open.
ramriot t1_iybfluq wrote
Reply to LPT: turn off "auto display images" in your email to stop hidden read receipt trackers by flutterbyasaurus
If you use Gmail for example they cache & filter these assets so that maximum, only a single fetch is made & originates from Google's own server
ramriot t1_iy8wrta wrote
Reply to LPT: when making your bed and fighting with the fitted sheet…The tag always goes in the bottom right corner by Clementine1234567
Is that right when viewed from the top or bottom of the bed?
ramriot t1_iy21nqh wrote
I dunno, service looking a bit ruff right now.
ramriot t1_ixtlr9m wrote
Reply to LPT: If your microwave dies, donate the glass tray before throwing out the appliance. Someone has broken theirs and will love finding it at a thrift store. by pioneertele
Plus that little wheeled triangle if you can.
ramriot t1_ixbe0pp wrote
In summary, like lat & long on the earth, fixed objects can be referenced by Equatorial coordinates via two angles called Right Ascension ( 0h 0m 0s - 23h 59m 59s ) & Declination ( +90 degrees to -90 degrees ) plus an ephemeride date for historical reference because the zero point on both axis is defined to be the vernal equinox (the point in space where the Sun appears to cross from the southern to the northern hemisphere), but because the earth precesses this position changes, the orientation of the Earth's axial tilt changes, and with it the reference grid.
There is also Ecliptic coordinates where the zero declination is the plane of the Earth's orbit around the sun, this coordinate system is useful sometimes for calculating planetary positions as this plane of the ecliptic is tilted by 23.5 degrees to the Equatorial coordinate system due to the Earth's axial tilt.
There are also Galactic coordinates where we still measure around the sky like the other two but put the approximate centre of the galaxy as our zero point in galactic longitude & orientate galactic latitude perpendicular to the plane of our host galaxy.
Finally no matter what coordinate system is in use an orbiting object in our solar system can have its position calculated for any reasonable point in time (barring interaction) with a set or elements that state things like the Semi Major Axis, longitude of the ascending node, ellipticity etc.
ramriot t1_iwuc8j4 wrote
Reply to comment by Alililele in 23 meteors in a cluster spotted over Norway by AyeGee
Evolution & differentiation of language over time, methinks
ramriot t1_iw8xavz wrote
Reply to Texas homeowner says 'hooker' ghosts have taken over rental property: 'They're trying to stir up business' by The_R3venant
Best Boo Job in town
ramriot t1_iw8rei0 wrote
Reply to comment by floreality in TIFU by informing my SO that I didn't arrive home safely. by floreality
I've always thought that like driving a car requires a license to prevent the unskilled from causing havoc, telecoms technology should too
ramriot t1_iw7247m wrote
This is why you turn on receipts, that way if you get a confusing response you can see the sent timestamp
BTW to see this in latest Android Messages app, hold down the message in question until it's highlighted, then touch the three dots in the upper right corner. Select "view details," and it will display both the time the message was sent and the time it was received.
ramriot t1_iviakda wrote
Reply to LPT: If you're buying a shoe. Make sure its body is stitched to the sole, not glued. by [deleted]
Also if you are one of those humans with more than the average number if legs probably consider buying a pair.
ramriot t1_iv43gz7 wrote
I don't doubt it.
I got a bus lane fine once (private company OBO council) , the lane started under an unlit railway bridge with an unlit warning sign. There was a prior warning sign further up the road but before the side road I turned into the main road from.
I wrote this all into my reply because no way I'm paying for that.
Ended up needing to write three more times as they kept referring it upwards.
My 3rd letter was supposed to be forwarded by them to the independent adjudicator & on this letter I added a post script to the effect that I will be copying all prior correspondence to the local MP who was collecting reports of such abuses.
Got a reply in under a week, to the effect that "since such considerable time has passed since the original infraction, they would be dropping the infraction".
I still passed on the letters & last I heard the company lost their contract & something like £45,000 in fines were returned.
ramriot t1_iuux1nq wrote
Reply to comment by dr_xenon in 30 minutes of car preheating in sub-zero conditions produces as much particulate emissions as driving 97km in a gasoline car, or 20km in a diesel car “These findings do not suggest to stop preheating cars; instead, we could reduce the emissions by using similar methods that are in place for engine” by giuliomagnifico
So, last winter I left my car outside overnight & then idling for 25minutes in -35°C, it was not warmed up even then & was not safe to drive.
ramriot t1_iuushv9 wrote
Reply to comment by ObjectiveDark40 in A huge tunnel has opened below Niagara Falls by RUN_MDB
Yup, but they charge silly money just to ride the elevator down & walk though it.
ramriot t1_iugqw5y wrote
Reply to [Homemade] No Knead Bread by Wyze_acre
I don't kneed this?
ramriot t1_j0mzxqw wrote
Reply to World’s first net-zero transatlantic flight: Fly London to New York on used cooking oil. Rolls-Royce Trent 1000 engines will power the airline's flagship Boeing 787s as they fly from London to New York in 2023. by Zee2A
If memory serves from smelling such vehicles passing, it's going to be interesting on the flight line & likely going to make all the baggage loaders etc very hungry for fried food.