6 comments

  • chasil10 hours ago
    There is a wiki on pair-instability supernovas. Antimatter (in the form of positrons) is a key factor.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Pair-instability_supernova" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Pair-instability_supernova</a>
    • ben_w5 hours ago
      My favourite kind of supernova, due to their absurdity.
      • chasil2 hours ago
        A hypernova is an even larger star that is theorized to end its life due to photodisintegration rather than pair instability.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Photodisintegration#Hypernovae" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Photodisintegration#Hypernovae</a>
  • smnplk1 hour ago
    Space, why so much violence ?
  • ck210 hours ago
    I just want to live long enough for space telescopes to evolve exponentially to observe kilonovas in the visual spectrum<p>I mean laser interferometers are an amazing advancement but just imagine seeing an earth-sized chunk of gold pop out of a kilonova (probably not my lifetime but eventually a human will see it happen)<p>Thank goodness this administration did not frack with Nancy Grace Roman Telescope, I thought the name alone would make them cancel it or rename it after him, wait maybe I shouldn&#x27;t even mention that idea...<p>* <a href="https:&#x2F;&#x2F;science.nasa.gov&#x2F;mission&#x2F;roman-space-telescope&#x2F;" rel="nofollow">https:&#x2F;&#x2F;science.nasa.gov&#x2F;mission&#x2F;roman-space-telescope&#x2F;</a><p>* <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Nancy_Grace_Roman_Space_Telescope" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Nancy_Grace_Roman_Space_Telesc...</a>
    • throwaway-away4 hours ago
      Check out the aragoscope [1]. It&#x27;s not planned, but we would already have the technology as it doesn&#x27;t rely on fragile and heavy lenses to be sent in orbit.<p>If you look at image 17 you can see that a simulated aragoscope that is in our technical reach could already resolve the Jupiter moons from almost 23 light years away. I hope as well that we will have something comparable while I am still around.<p>[1] <a href="https:&#x2F;&#x2F;www.nasa.gov&#x2F;wp-content&#x2F;uploads&#x2F;2017&#x2F;03&#x2F;2014_phase_i_webster_cash_the_aragoscope.pdf" rel="nofollow">https:&#x2F;&#x2F;www.nasa.gov&#x2F;wp-content&#x2F;uploads&#x2F;2017&#x2F;03&#x2F;2014_phase_i...</a>
      • Levitating3 hours ago
        Wow, that would be absolutely amazing.<p>For reference, there are 103 known main sequence stars within 20 light years.[1]<p>[1]: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;List_of_nearest_stars" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;List_of_nearest_stars</a>
    • vitally36434 hours ago
      Well I mean I would expect that the gold would be fired off in all directions as more of an atomic mist than a chunk
    • sourcegrift2 hours ago
      He has stopped Mtf trans females from competing in female sports thus pretty much segregating 10s of millions of Americans and people of color.<p>I don&#x27;t think it&#x27;s possible to do worse, even for him.
  • wglb1 day ago
    Arxiv reprint: <a href="https:&#x2F;&#x2F;arxiv.org&#x2F;abs&#x2F;2605.16487" rel="nofollow">https:&#x2F;&#x2F;arxiv.org&#x2F;abs&#x2F;2605.16487</a>
    • tomhow1 hour ago
      Thanks! We&#x27;ve added it to the thread header.
  • bebeidjdkrjrjr10 hours ago
    [flagged]
    • wewtyflakes10 hours ago
      I know you are a bad-faith bot account, so this is not posed to you.<p>I am wondering why there are so many of these accounts popping up. They seemingly only exist to antagonize. What do their operators get out of that?
      • junon10 hours ago
        What do 14 year olds get out of trolling <i>anything</i>? A cheap grin and something to do on an after school evening.
      • detritus9 hours ago
        heh, funny you say that - I just yesterday almost bit at some obvious Nego-Trolling on here and remembered &quot;Just don&#x27;t engage&quot;.<p>Some people, for some reason at certain points in their life, just want to shit on other people&#x27;s stuff, any way that they can, for... reasons.<p>I mean, clearly it&#x27;s not to make themselves feel better, because how on Earth could that work?<p>There&#x27;s no value in engaging, in any way whatsover. Sadly there&#x27;s very little that can be done to prevent that form of human behaviour, without otherwise souring the experience for the generality.<p>*shrug, whatchagonnado?
        • AnimalMuppet9 hours ago
          It can make them feel better by giving them a chance to look down on someone else. (The &quot;looking down&quot; doesn&#x27;t have to be the <i>content</i> of the post - the <i>act of trolling</i> is a form of looking down on someone.)
          • scns8 hours ago
            &gt; It can make them feel better by giving them a chance to look down on someone else.<p>That&#x27;s the idea but it does not work. Self esteem is still negative afterwards
            • MadnessASAP5 hours ago
              Whether or not it works isn&#x27;t what matters. It&#x27;s whether or not the perpetrator, consciously or not, believes it works.
        • nutjob29 hours ago
          &gt; I mean, clearly it&#x27;s not to make themselves feel better, because how on Earth could that work?<p>When you&#x27;re really, really angry you look for an outlet. Some people kick the dog, some abuse their gf&#x2F;wife&#x2F;kids, others troll on online forums.
          • detritus9 hours ago
            Yeah, I get that. But does it actually make them feel better?<p>What do they say about sugaring trauma?
      • nutjob29 hours ago
        Welcome to the general public. You&#x27;ll meet all the people you go to great lengths to avoid in the real wold, online.
  • timwis9 hours ago
    Dark Forest theory, anyone?
    • groos9 hours ago
      It was a supergiant, hence died at a young age, and unlikely to have evolved life of any kind in its system.
      • tgrowazay8 hours ago
        That’s what Singer’s civilization wants you to think before they send a Photoid or Dual-Vector foil (but later would require a supervisor’s approval which is a PITA)
        • dotancohen5 hours ago
          <p><pre><code> &gt; before they send a Photoid </code></pre> Plenty of services require a Photo ID nowadays.
    • chasil6 hours ago
      Pair-instability can only happen in low-metalicity surroundings.<p>The big bang created hydrogen, helium, and small amounts of lithium. Any higher elements are created by stars, and a significant presence of those &quot;metals&quot; will take a star down a different path than pair-instability.<p>Low-metalicity environments are not likely to be friendly to life.