XTornado, If you want a cool.animated version : pouria.dev/unknown-pleasures
Gilles_D, the rule is not
grozzle, didn’t know the album cover was from a pulsar. I’d heard a story it was some kind of ECG trace of a heart attack / someone dying.
OctopusProbablemmy, Afar I actually just watched a VSauce short about this last night.
abbotsbury, The pleasure is unknown… https://youtu.be/TN25ghkfgQA
A_Very_Big_Fan, Isn’t this an album cover
csfirecracker, Joy division \m/
HanDuo, Joy Division’s debut album in 1979… “Unknown Pleasures”. Giving some insight into the title of this post.
Skullgrid, Ok but what is it?
TheDarkKnight, I didn’t know either so I looked it up, apparently it was the first detected radio pulsar, briefly thought to be an extra terrestrial transmission…and later used on Joy Division album cover: en.m.wikipedia.org/wiki/PSR_B1919%2B21
abbotsbury, Like the other amigo said, it’s detected emissions from a pulsar. For some more explanation, pulsars spin really fast and emit radio waves, think of it sorta like a lighthouse. So what the image is measuring is the intensity of the radio waves from this pulsar as it spins, with each period stacked in front of the last.
Visual aid from Wikipedia:
https://lemmy.world/pictrs/image/14faf5e4-7f3b-4981-b812-a6ddec791cfd.webm
As you can see, this one has been simplified to demonstrate the concept, and the actual data is much more varied and interesting to look at; I do not know what causes the peak offsets and would also like an explanation
riodoro1, with each period stacked in front of the last.
Yeah, that part is confusing because the description says
Time increases … toward the top …
Which would mean the oldest pulse is in the foreground.
abbotsbury, ahh you’re right, I see, a little counter intuitive since going front-to-back would obscure newer data that wont be seen at all, while going back-to-front would only obscure older data
abbotsbury, Tried cleaning it up a bit and inverting
https://lemmy.world/pictrs/image/224fd936-d559-4f8f-9d51-55990dd7bbb1.png
flango, Looks great !
abbotsbury, Thanks!
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