This is incredible. I'd like to know what the physical process is here in terms of the colors and current paths. Is the red light a product of hydrogen gas disassociated from water vapor? Spectral phenomena of glow discharge?
> My first time-lapse. Thanks to some instruction and tips from @Astro_Ayers, I caught my first aurora. After seeing the result, I told her this felt like fishing. Prepping the camera, the angle, the settings, the mount, then setting your timer and coming back to hope you got a catch. And after catching my first fish, I think I’m hooked. Thanks, Vapor!
> These are Star Trails taken from my previous mission to the ISS, Expedition 30, in 2012. I call it "Lightning Bugs."... In the photo, stars make arcing trails in deep space, while a huge thunderstorm pounds Earth below as seen from the time history of lightning flashes.
Oh yes, let's everyone stop posting links to twitter because someone disagrees with the political views of the owner. So much for having some tolerance right?
I've wished people stopped posting links to twitter the moment twitter started requiring people to create/log into an account in order to view anything. I think the political concerns are every bit as valid as concerns over accessibility and privacy, but ultimately there are a lot of good reasons to avoid linking to twitter.
Triggered much? I’m expressing my free speech by refusing to use his neo nazi website and encouraging others to avoid it too. Why do I have to tolerate him?
Please don't partake in virtue signalling. It makes you feel like you're making a difference, allows you to signal to your tribe that you feel a certain way (gaining you virtue among them), but requires 0 actual effort.
The video of the sprite lightning in Tibet blew me away.
https://x.com/DarshanRajguru5/status/1940829392269463943
This is incredible. I'd like to know what the physical process is here in terms of the colors and current paths. Is the red light a product of hydrogen gas disassociated from water vapor? Spectral phenomena of glow discharge?
News story about that: https://petapixel.com/2025/06/02/rare-red-sprite-photographe...
Just, wow.
I've never seen anything like that.
Thank you for sharing it on HN!
We're spoiled in terms of cool astronauts! A couple of personal favorite posts:
1. Jonny Kim: https://www.instagram.com/p/DKkj52PuO6h/
> My first time-lapse. Thanks to some instruction and tips from @Astro_Ayers, I caught my first aurora. After seeing the result, I told her this felt like fishing. Prepping the camera, the angle, the settings, the mount, then setting your timer and coming back to hope you got a catch. And after catching my first fish, I think I’m hooked. Thanks, Vapor!
———
2. Don Petit: https://old.reddit.com/r/space/comments/xbmhz4/i_captured_so...
> These are Star Trails taken from my previous mission to the ISS, Expedition 30, in 2012. I call it "Lightning Bugs."... In the photo, stars make arcing trails in deep space, while a huge thunderstorm pounds Earth below as seen from the time history of lightning flashes.
https://web.archive.org/web/20250215124004/https://blogs.nas...
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Oh yes, let's everyone stop posting links to twitter because someone disagrees with the political views of the owner. So much for having some tolerance right?
please keep this kind of rhetoric to reddit
I've wished people stopped posting links to twitter the moment twitter started requiring people to create/log into an account in order to view anything. I think the political concerns are every bit as valid as concerns over accessibility and privacy, but ultimately there are a lot of good reasons to avoid linking to twitter.
In all seriousness, drawing a line once we reach Nazis is absolutely fair. That is not something to tolerate.
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Triggered much? I’m expressing my free speech by refusing to use his neo nazi website and encouraging others to avoid it too. Why do I have to tolerate him?
The links appear to be broken today.
Perhaps X links are ephemeral?
There are some things that you should not be tolerated. Greedy, manipulative, lying bullies are one of those things.
Meanwhile supporting X and its owner is rhetoric that actually deserves to be kept not even to Reddit but to 4chan/b https://deadline.com/2025/07/elon-musks-ai-chatbot-grok-prai...
Please don't partake in virtue signalling. It makes you feel like you're making a difference, allows you to signal to your tribe that you feel a certain way (gaining you virtue among them), but requires 0 actual effort.
It's not virtue signalling: it's a concrete action. Refusing traffic from an audience like Hacker News is meaningful. Any boycott is meaningful.
It is also the opposite of silence. Someone speaking up and saying, 'This is not okay and we should not do it', as the OP did, is important.
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Refusing to use a platform is literally the opposite of virtue signaling
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