I only have this to say: Fuck the sky pollution. Starlink has been ruining stargazing and star photography and Elon lied about its impact. He claimed they would be invisible with his amazing paint but they're still visible and fuck it up for people who enjoy watching the stars.
Oh, I mean, it would be bad, even if it "just" meant no/unsafe launches and no LEO for X months/years. I just kinda feels it pales compared to the climate related problems coming generations are likely to face.
... an ablative cascade would destroy nearly every satellite and would render ALL launches russian roulette with 5 chambers filled, and it would last for centuries.
I really have no idea where you are getting your numbers from but there's ALREADY enough high velocity mass to make LEO a minefield for generations and we're not stopping launching.
Pulling them out of my ass, mostly. Like, the people I know in the field don't seem overly worried, but my own opinion mostly comes from a general awareness that stuff in LEO comes down eventually, and that for the orbit the Starlink Stuff is on, that would probably mean a few years max.
Not my field, and if I actually research it, I might find I'm wrong.
I still maintain that even a complete loss of launch and orbital capability, while of course a great and horrible disaster, wouldn't doom us much more than our current course as a species already is.
Sure, but you seem to also present an opinion, based on sentiment from your friends. Since we both seem to lazy to actually figure it out properly, I feel we're at an impasse.
Starlink satellites are in low earth orbit and deorbit naturally after a few years because of the small amounts of escaping atmosphere slowing them down. A collision cascade can't really happen because it's a fundamentally decaying orbit.
At least, there's no risk of lasting orbital debris, at the cost of the satellites having a much shorter lifespan.
... Well, fortunately, I don't manage satellite deployments, but your friends are welcome to tell NASA that their aerospace engineers are actually wrong and need to stop SpaceX before they ground humanity. I'm sure they would love to hear it.
Really playing to your username, eh. I am familiar with Kessler Syndrome. You'll note that the most important aspect of said event, is the height, at which objects orbit, as that determines how long it takes for it to deorbit. The level of risk declines precipitously the closer to the earth the orbit is, and even if there was a catastrophic cascade at the height Starlink orbits, it would clear after a few years at most.
Impact ejection can cause eccentric orbits, but at that height, those deorbit even faster.
Fortunately, the very clever scientists at NASA have long since determined that there is essentially no risk from Starlink and similar satellite constellations, because they've been paying attention to this since before I was born.
Fortunately, the very clever scientists at NASA have long since determined that there is essentially no risk from Starlink and similar satellite constellations,
That is patently not true to the point that it is effectively a lie
Right. I'll note, that your linked article says nothing about Kessler beyond a quote of his saying that space debris would continue to increase even if all launches stopped. Otherwise, the article mainly comments that the sheer number of Starlink satellites below the ISS could interfere with launch/entry opportunities while drastically increasing the number of space objects being tracked by the DoD and NASA.
There are plenty of legitimate reasons to criticize Starlink, all I'm pointing out is that Kessler Syndrome is not one of them. I'm assuming you've somewhat ironically blocked me, but since we're exchanging links, here is an article that interviews several scientists including one that worked under Kessler at NASA and now works on NASA's orbital debris modeling.