Hacker News new | ask | show | jobs
by chargingmarmot 1012 days ago
I agree with the sentiment about media sensationalism but I don't think "space junk" is an issue we should be so quick to dismiss.

Just because the problem hasn't gotten too bad yet doesn't mean it isn't real (especially because the problem involves a positive-feedback "domino effect" and junk might be infeasible to clean up).

https://en.wikipedia.org/wiki/Kessler_syndrome

With regard to Starlink: I was a little bit concerned because of the large number of satellites they're putting up, but as far as I understand, Starlink isn't actually a big risk right now as far as space junk goes because the satellites orbit at low altitudes (340 miles) and are expected to naturally de-orbit relatively quickly due to atmospheric drag. (The decision to put them at low altitudes had to do with network latency.) If Elon were to say tomorrow, "hey we're moving Starlink out to 500 miles" I would hope some kind of regulation would be able to prevent that.

1 comments

Everything we launch has to pass through these low altitudes. If these altitudes become full of debris we might have to stop all launches for several years [1] and no human presence at space for a bit longer. Quite scary, better to handwave it away "aint happen space is big".

https://space.stackexchange.com/questions/59559/how-long-can...

The starlink orbits are self cleaning, they are so low that without intervention things just slow down and fall out.