cool! i had wondered if he was someone you'd run into before
― circles, Sunday, 20 March 2022 21:36 (two years ago) link
good livestream
At their worst, the Nautilus dive streams are fascinating. At their best, you watch new species being discovered live. Particularly recommended if you enjoy space launches. https://t.co/VcjPcWKmCT— Charlie Loyd (@vruba) March 23, 2022
― 𝔠𝔞𝔢𝔨 (caek), Wednesday, 23 March 2022 21:44 (two years ago) link
hi caek, nice corner!
feel free to ignore any or all of this, which starts the chilling words, "i have a comment and then a question"
the comment is that the james webb telescope ("the webb?" <-- a question inside the comment) has helped me understand, more concretely, some familiar old ideas about relativity and time travel in a more concrete way. i've understood that the light that we see from distant objects like stars are images of a previous time, since the light emitted has to travel for years (a "light year", if i may coin a phrase) before it reaches us. but i never really thought about the ramifications of capturing the light of more distant stars than ever before. it's just "light" but it's also an image of the distant, distant past.
that got me thinking (yes this is still the comment - i am seriously replicating a real life "comment and then a question") about what it means to travel along the path of that light, back toward the origin of the star, realizing that in a way it would be like accelerating into the past. if you stood on earth and received the light at normal speed (light speed), you experience the past of that distant star at a steady, human/earth rate. but when you begin to travel into the light, your experience of their past happens more rapidly - it's all in there, it's just more compressed (?). and that, if you could travel against the light quickly enough, you experience all of the billions of years of its history in the time that it takes you to travel from earth to the star.
and then (comment!), in the other direction, that you could could effectively freeze one's experience of time by "riding along" the path of the distant star's light at the exact same speed, always seeing it in the same way. and that in a sense you could "reverse" time if you could move even faster than the speed of light, and traveled back to an earlier form of the light/image. it's cool that the images from the webb make that kind of idea of more understandable and real (at least to me).
*loud booing from a 4th year grad student*---alright alright so here's my question! jfc.
all of that got me thinking about where the origin of the big bang is supposed to be, and how seeing more distant stars could help us understand our own galaxy's position in the universe. i've had the idea that the big bang is in the "middle", with matter generally heading outward ever since. that might be wrong in itself, i don't know. [coughs directly into mic, saliva sounds]. would the webb's ability to see farther than ever before provide additional data about the previous celestial coordinates/paths of existing stars/objects that we already knew about? is it possible to "see" that an existing galaxy briefly obscured another galaxy or affected its gravity/path at some point in the past?
i don't know, you can disregard and ad lib freely, i'll take my answer off the air, thank u caek
― Karl Malone, Wednesday, 30 March 2022 17:59 (two years ago) link
"if you could travel against the light quickly enough, you experience all of the billions of years of its history in the time that it takes you to travel from earth to the star."
"effectively freeze one's experience of time by "riding along" the path of the distant star's light at the exact same speed, always seeing it in the same way."
these things are not possible, because, however fast you go, in whatever direction, light travels at the speed of light relative to you. that's special relativity baby.
"the webb's ability to see farther than ever before"
i think you're a bit confused about the way in which it is true. imagine a sailing boat. the webb telescope doesn't see further by moving the horizon away from us. things still drop below the horizon when they drop below the horizon. the webb allows us to see further by having better eyesight. i.e. at a given distance, the webb can see fainter things than existing space telescopes. in the case of telescopes, the horizon is set by the speed of light. it is essentially the speed of light x the age of the universe away from us. no innovations in telescope design will ever change this.
― 𝔠𝔞𝔢𝔨 (caek), Wednesday, 30 March 2022 18:51 (two years ago) link
if I may throw some of my thoughts in the air herewhat we see is long gone - it either doesn't exist anymore or it's far away from where the light started its travels (point at the Sun: you're wrong, you're pointing at where it was 8 minutes ago)the big bang happened everywhere. the whole universe was there when it happened. (/it's still happening)
― StanM, Wednesday, 30 March 2022 18:57 (two years ago) link
thanks caek!
i do want to say that for a brief time, i felt like i could barely understand time travel and how it might work, and in that moment i was standing on the shoulders of nincompoops
― Karl Malone, Wednesday, 30 March 2022 19:12 (two years ago) link
Time does slow down for you the faster you travel though (i.e. In your subjective experience, external events speed up). This is the probably the second easiest way to travel forward in time, the first being cryogenic freezing (pending first successful thawing of human subject).
― ledge, Wednesday, 30 March 2022 19:24 (two years ago) link
Time does slow down for you the faster you travel though
This is definitely true in Nebraska
― Andy the Grasshopper, Wednesday, 30 March 2022 19:27 (two years ago) link
but the very easiest way of all to travel forward in time is to do nothing special at all and just let it happen
― more difficult than I look (Aimless), Wednesday, 30 March 2022 19:30 (two years ago) link
I knew i should have specified faster than one second per second.
― ledge, Wednesday, 30 March 2022 19:31 (two years ago) link
faster than one second per second
but cryogenic freezing doesn't alter the pace of time itself; it merely suspends one's perception of its passage even as time galumphs along at its normal rate.
― more difficult than I look (Aimless), Wednesday, 30 March 2022 19:35 (two years ago) link
If I pass through a wormhole or race off and back at light speed or accidentally fall into a cryogenic freezer, what's the difference when I appear/arrive/wake up in the year 3000?
― ledge, Wednesday, 30 March 2022 20:11 (two years ago) link
there is no difference in your perceptions, but there is a major difference in the physics
― more difficult than I look (Aimless), Wednesday, 30 March 2022 20:17 (two years ago) link
first of all, techno
xp
― Karl Malone, Wednesday, 30 March 2022 20:17 (two years ago) link
i hold that the techno would be extremely different and immediate
besides that, energy lasers have replaced bullets, every door requires a digital key card, and your name is cobra19
― Karl Malone, Wednesday, 30 March 2022 20:18 (two years ago) link
cobra19? What is this, the 2500s?
― ledge, Wednesday, 30 March 2022 20:23 (two years ago) link
haha, otm it's true
― Karl Malone, Wednesday, 30 March 2022 21:05 (two years ago) link
iirc if you can hit warp 10 you will experience being everywhere all at once, but then you turn into a lizard
― mookieproof, Wednesday, 30 March 2022 21:20 (two years ago) link
The W boson appears to be heavier than expected:https://www.science.org/doi/10.1126/science.abm0101
― StanM, Friday, 8 April 2022 23:40 (two years ago) link
Yeah I've seen skepticism on this from people who know more than me, gonna need a ruling from caek.
― brisk money (lukas), Saturday, 9 April 2022 01:48 (two years ago) link
Not my area at all but here’s a couple of posts on it by reliable scientists https://telescoper.wordpress.com/2022/04/09/massive-excitement/https://profmattstrassler.com/2022/04/08/a-few-remarks-on-the-w-boson-mass-measurement/
― 𝔠𝔞𝔢𝔨 (caek), Saturday, 9 April 2022 14:39 (two years ago) link
oh! thanks!
― StanM, Saturday, 9 April 2022 14:43 (two years ago) link
The James Webb Space Telescope analysing sound from the heart of the galaxy is amazing. I had no idea this was possible(film courtesy of NASA) pic.twitter.com/mrOQ0LnlB6— Chris (@justachrisaway) March 29, 2022
― the cat needs to start paying for its own cbd (map), Tuesday, 10 May 2022 02:17 (two years ago) link
https://www.npr.org/2022/05/12/1098472567/image-black-hole-milky-way?t=1652362048265
https://media.npr.org/assets/img/2022/05/12/black-hole-milky-way-bb0124cb43ed0a77533657759baa424f5d5fce7c-s800-c85.webp
― StanM, Thursday, 12 May 2022 13:27 (two years ago) link
itt: stanm posts hole
― balsamic vaccinegar of moderna (bizarro gazzara), Thursday, 12 May 2022 13:50 (two years ago) link
pictured: the day after spicy food
― StanM, Thursday, 12 May 2022 13:52 (two years ago) link
how many billions of years do I have to wait before I'm pulled into the giant black hole?
make it now, please
― mh, Thursday, 12 May 2022 14:21 (two years ago) link
dynamically extremely difficult for anything other than dust and gas to get pulled into a black hole, sorry for your loss.
you might get lucky when we collide with andromeda in 5bn years, but both galaxies are almost entirely empty space, so probably not.
― 𝔠𝔞𝔢𝔨 (caek), Thursday, 12 May 2022 17:08 (two years ago) link
i can wait
― towards fungal computer (harbl), Thursday, 12 May 2022 19:01 (two years ago) link
fun fact: you could easily fit all the other planets in the gap between the earth and the moon.
― 𝔠𝔞𝔢𝔨 (caek), Thursday, 12 May 2022 19:03 (two years ago) link
cannot stress enough how empty space is.
Andromeda, the closest galaxy, is 2.5 million light years away. 2.5 million years ago, the first homo habilis started to evolve. If humans could travel at the speed of light (in stasis, I suppose), look around a bit, make friends with some andromedans and then come back, what species would they report to, 5 million years in the future? (if they managed to find the solar system and Earth again and something was still alive here, that is).And that is our closest neighbouring galaxy, remember.there's a lot of space in space.
― StanM, Thursday, 12 May 2022 19:48 (two years ago) link
[cue Hawkwind's "Space Is Deep"]
― nickn, Friday, 13 May 2022 03:45 (two years ago) link
dust and gas
ease yourself intoa body bag
― mookieproof, Friday, 13 May 2022 03:52 (two years ago) link
A perspective view on Jupiter with artificial vertical relief applied. Processed using @NASAJuno imagery from Perijove 26https://t.co/5EVEk1zX8c pic.twitter.com/N5qlmYLCwT— Kevin M. Gill (@kevinmgill) August 20, 2020
― 𝔠𝔞𝔢𝔨 (caek), Friday, 1 July 2022 04:20 (one year ago) link
beautiful!
― StanM, Friday, 1 July 2022 04:40 (one year ago) link
no.
― mookieproof, Friday, 1 July 2022 04:55 (one year ago) link
uh oh, downvotes for Jupiter
― StanM, Friday, 1 July 2022 05:31 (one year ago) link
"Upset stomach? Try Pepto Bismol."
― Ned Raggett, Friday, 1 July 2022 14:53 (one year ago) link
*hiccup*
I stand with mookie
― mom tossed in kimchee (quincie), Saturday, 2 July 2022 04:43 (one year ago) link
jwst about to do it
― 𝔠𝔞𝔢𝔨 (caek), Monday, 11 July 2022 21:30 (one year ago) link
https://www.nasa.gov/nasalivehttps://www.nasa.gov/webbfirstimages
me after a few pints
https://stsci-opo.org/STScI-01GFRYYRTCTMX197BY86MBFCR9.png
― 𝔠𝔞𝔢𝔨 (caek), Friday, 28 October 2022 16:12 (one year ago) link
that's where Tar Trek happens
― | (Latham Green), Friday, 28 October 2022 17:33 (one year ago) link
damn whut
― Tracer Hand, Friday, 28 October 2022 20:29 (one year ago) link
https://webbtelescope.org/contents/media/images/2022/053/01GFRYSFM89AFADVAA0W625BSB?news=true
― 𝔠𝔞𝔢𝔨 (caek), Friday, 28 October 2022 20:35 (one year ago) link
caek, would you be trying to submit propopsals for using jwst if you were still doing astronomy research, or would that not be especially relevant to the research you did/too much of a hassle/unlikely to succeed given jwst's priorites/etc.?
― circles, Saturday, 29 October 2022 15:09 (one year ago) link