Comment on A million new SpaceX satellites will destroy the night sky — for everyone on Earth
NotMyOldRedditName@lemmy.world 4 days ago
While this very well might fuck up land-based stuff looking at space, people are often overlooking what this would mean to stellar photography from space.
If they can truly launch these million data center sats profitably, that means starship works. That means payload to space is relatively cheap.
That means we could also send large quantities of large telescopes into space on the cheap, and avoid the crazy expensive cant fail telescopes because the cost to get them up there isnt prohibitive.
Things very well might change, but it will also open up possibilities in the same area.
Theoretically, even if we assume SpaceX is overshooting, that’s an interesting thought:
visualcapitalist.com/the-cost-of-space-flight/
In practice though? I’m more concerned about interest in funding astronomy in the first place.
That, and big fat telescopes are fundamentally expensive. And (at least for the optical variety) “swarming” them with a bunch of cheaper units isn’t as effective as building a big one.
Oh, I wasn’t thinking swarms the same way these million sats will be, I was thinking just using the whole payload diameter of around 9m for the lens/mirror (minus any housing) but they could potentially just buy the whole starship.
James Webb cost billions because of it’s complexity and launch costs, none of which is needed when there’s 9meters to work with without any complexity at all.
If you wanted, you could make a super crazy expensive satellite that worked just like James Webb and have a massive mirror as well, but that’s a bit different than my large quantity of cheaper telecopes in space.
I wonder how big you could get the mirror if you did it James Webb style in starship.
Presumably 7x ~8m hexagons folded up?
That is a good point though. And if one were to design a “budget” 9m space telescope, they could amortize the R&D dramatically by launching the same design many times, perhaps with different sensors for different purposes?
Ya, that would get costs down further if they were able to amortize it over a larger quantity.
We could also get them pretty far out with starship refuelling, but refuelling a starship back to full capacity to then go somewhere would raise the cost a lot. But imagine a 7x 8m hexagon one sent out into deep space. That would be super expensive though, we wouldn’t get a lot of those haha.
This is all a massive big IF though. Starship being fully reusable like they think is still very far from a given, so none of this might come true in our lifetimes.
It might be super cheap in the future to launch them but it will be into a field of fast moving garbage. The cost effectiveness of throwing more and more telescope up into space to try and get pictures before they get knocked out by the debris of the past will be a losing proposition.
Nah, everything at super low orbits like these constellations decay quite quickly. Even in cases of total loss of all satellites (eg Kessler Cascade), they would all reenter within a couple years.
You could relatively easily just put your space telescopes above that orbit and they’d be just fine.
Ok so they would orbit above the field of space junk, would they by any chance have to fly through that field of space garbage to get up to that higher orbit?
Generally no. The proposed orbit for these datacenter satellites (which is still a ridiculous idea for oodles of reasons) puts them all in sun synchronous orbit, leaving nigh infinite paths to send a space telescope up through.
pigup@lemmy.world 4 days ago
Elon will not make it cheap. Falcon 9 prices keep rising. He’s an exploiter and will enshitify his service once enough people are hooked on it.