axialintellectual
axialintellectual t1_jctcpbv wrote
Reply to comment by beef-o-lipso in Containing an incredible half-million stars, this 8-billion-year-old cosmic bauble is one of the largest and brightest globular clusters ever discovered. Credits: ESA/Hubble by Davicho77
Good question! On the planet formation side: protoplanetary disks would be heavily irradiated by the other nearby stars, which tends to shorten the lifetime available to planet formation; they can also get disrupted by flyby-events. If a planetary system does form, those same flybys continue and can disrupt it over longer timescales. On the other hand, we don't - to the best of my knowledge - have very good constraints on planet occurrence rates in globular clusters, because they're far away and hard to observe, but I would say from a theoretical point of view these are quite well-understood mechanisms.
axialintellectual t1_jcszb2m wrote
Reply to comment by arealuser100notfake in Containing an incredible half-million stars, this 8-billion-year-old cosmic bauble is one of the largest and brightest globular clusters ever discovered. Credits: ESA/Hubble by Davicho77
Significantly closer! The stellar density in the Solar neighborhood is around 0.14 pc^(-3), in globular cluster cores that goes up to ~ 1000 pc^(-3). That may also mean that the formation (and survival) of any planets is significantly suppressed around the stars in a globular cluster.
axialintellectual t1_jaduryl wrote
Reply to comment by I_Automate in [WP] "One drip of this poison is enough to kill a whale." The scientist points towards a table, but the beaker isn't there. Instead a silly coffee cup shaped like a beaker sits. You lower the not coffee cup from your mouth. Tastes like lemon-lime. by DistillerCMac
Good thing too that the one land animal mad enough to think they're tasty is also mad enough to domesticate them and plant them everywhere, so it's a win for the peppers anyway.
axialintellectual t1_j8pe3oo wrote
Reply to comment by virgilreality in The Nancy Grace Roman Space Telescope - the next major step in astronomy that will help unlock the secrets of the universe's expansion and dark energy. by upyoars
It's like a regular telescope, but wearing a toga!
axialintellectual t1_j7vh21f wrote
Reply to comment by FarFetchedFiction in [WP] According to astronomy, wishes take thousands or even millions of years to arrive to the wishing stars. Today, wishes from people long past are starting to come true. by WorsCartoonist
Lovely story. But I think you meant Jabari rather than Sadiki in the second-to-last paragraph?
axialintellectual t1_j7rmtl1 wrote
Reply to comment by MrMunchkin in The James Webb Space Telescope just found an asteroid by total accident, its smallest object yet by pecika
> there's too much to unpack here
Well, no, there really isn't. You say Webb produces data 'without intervention by a human', and 'a huge amount of findings [are] produced by an algorithm'. That's a really weird way of putting it, because the vast majority of Webb time is obtained by individual projects designed to look at specific things, with dedicated analysis plans. Of course there's a nonneglible amount of bycatch, so to speak - but that's not what I read in your comment.
axialintellectual t1_j7qpecg wrote
Reply to comment by MrMunchkin in The James Webb Space Telescope just found an asteroid by total accident, its smallest object yet by pecika
That does not - at all - resemble the work my colleagues and I are doing with JWST data. MIRI MRS has a FoV of 6.6'' x 7.7''; that's really quite large but it's not gigantic by any means (the size of the detector is impressive, but that's because this is an IFU). Also, I haven't seen particularly unusual amounts of machine learning in any of the data processing papers so far. Could you clarify what you're talking about here?
axialintellectual t1_j7mjsi4 wrote
Reply to comment by MrMunchkin in The James Webb Space Telescope just found an asteroid by total accident, its smallest object yet by pecika
JWST doesn't. In this case, it's arguable (they picked it up on calibration data, which are taken regularly) that it sort of did, but given Webb's limited lifetime and extreme pressure on observing time, it's essentially always being directed to look at something, calibrating, or changing its orientation. It's not an automated survey telescope!
axialintellectual t1_j282cj3 wrote
Reply to comment by nova9001 in China reveals ambitious plans for Asia's largest optical telescope | The new telescope will have an aperture of 19.7 feet (6 meters) by 2024 while its mirror will be expanded to 26.2 feet (8 m) by 2030. by chrisdh79
I have issues with the author, yes, but I also genuinely have some issues with the way NAOC (seem to) approach this, however hard that apparently is to believe.
axialintellectual t1_j27yxai wrote
Reply to comment by nova9001 in China reveals ambitious plans for Asia's largest optical telescope | The new telescope will have an aperture of 19.7 feet (6 meters) by 2024 while its mirror will be expanded to 26.2 feet (8 m) by 2030. by chrisdh79
It's more 'being annoyed at the blatant overstatement and propagandistic tone' but sure, call it being triggered.
axialintellectual t1_j27ysh9 wrote
Reply to comment by toodroot in China reveals ambitious plans for Asia's largest optical telescope | The new telescope will have an aperture of 19.7 feet (6 meters) by 2024 while its mirror will be expanded to 26.2 feet (8 m) by 2030. by chrisdh79
I know Chinese astronomers work with colleagues outside of China, but I mean specifically when it comes to instruments and telescopes like this. And sure, there are specific use cases where more similar instruments are better - but the pressure on 6m-class telescopes isn't that high. It's also not observing a different part of the sky, so then you're getting into the pure time series coverage thing, which again, nice, but not particularly groundbreaking either, and certainly not deserving of this level of hyperbole.
axialintellectual t1_j26jkqs wrote
Reply to China reveals ambitious plans for Asia's largest optical telescope | The new telescope will have an aperture of 19.7 feet (6 meters) by 2024 while its mirror will be expanded to 26.2 feet (8 m) by 2030. by chrisdh79
> When it comes to observing our skies, it’s hard to compete with China’s initiatives. If the nation continues its current efforts it could soon lead the way in space observation.
This is just... Nuts? This article mentions several telescopes that will in the future do exactly zero things the rest of the world isn't already doing. Roman will do the same as the space telescope they discuss, at a slightly higher resolution, and the only way in which this segmented telescope seems to resemble Webb is the segmentation; but we were already doing that anyway?
Chinese astronomers have every right to be proud of their work, but not in this way please. Also, I do feel like it's more sensible to collaborate with other countries on these projects than doing them yourself, as it seems like there's a lot of essentially duplicate facilities now, but that's of course policy at a level most astronomers can't affect either.
axialintellectual t1_j1ckvuu wrote
Reply to comment by vxxed in NASA captures a "snapshot in time" showing how a star is born among the Cosmic Cliffs by scot816
It's also on arxiv for free, you can find it here.
axialintellectual t1_jcth8h9 wrote
Reply to comment by beef-o-lipso in Containing an incredible half-million stars, this 8-billion-year-old cosmic bauble is one of the largest and brightest globular clusters ever discovered. Credits: ESA/Hubble by Davicho77
It's still rare, but the orders of magnitude higher density, and the fact that globular clusters get quite old, means that there's a lot of opportunities. Here's a recent paper about the topic, if you want to read more.