The speed limit is the speed of light.

With that in mind the universe is infinite because the "edge", if there is such a thing, is moving away from us faster than that.

If you enjoy being anxious about things you can't prevent or even detect then how's this:

It's possible that our local presentation of the universe is just local, somewhere out there are other "big bangs" which occupy the same spacetime but at immense distances and their "edges" are approaching us at the speed of light.

We wouldn't even see them coming. We'd just be hit with an overwhelming amount of radiation before we know it.

(this is likely "not even wrong" in how wrong it is, but I do like a cheery thought)

It may be better / cheaper to do some other form of geoengineering.

Dig a really big hole in the middle of a desert, cover it with a highly reflective geodesic dome / tent and use canals to funnel "surplus" seawater into it. Use solar power to refrigerate the inside of the tent and harvest the (slightly) desalinated water for something useful.

Cover all the deserts with solar panels... cheaper.

Launch a big venetian blind in the earth sun lagrange point to reduce insolation by a percent or two.

We may need that water at some point, throwing it away seems silly.

Some factual and some snarky answers, which is to be expected, but friend, all the answers boil down to: You have massively underestimated the size of the Earth, including the staggering amount of water on the Earth, underestimated the weight of water, and/or overestimated the size of current human rockets.

It would take more than 90 of today's largest rockets to lift a single Olympic swimming pool's worth of water into space. It really doesn't matter how cheap it gets, there's simply no way it'll ever get cheap enough to move an appreciable amount of water off the Earth's surface.

(via rockets)

Well, see the thing about water is... we kinda need it. In fact, despite how much we Do have, we don't actually have enough. I'm not just talking about fresh water, even if we built a billion desalination plants and turned all the oceans into usable water, we'll still run out. So let's not speed that up.

[removed]

Sounds like a type 1 or type 2 multiverse,

https://en.m.wikipedia.org/wiki/Multiverse#Types

Yea, forget a space elevator gimme the space main water line

The carbon dioxide from all those rocket launches would add to the global warming, I think.

Seems like a way bigger logistical nightmare than just reversing climate change

That's only ~69k / day. Nice.

[removed]

There are gravitational waves

[removed]

You just build a pipeline up into space with a pump, simple.

Space wedgies is a better term for this phenomena. Better describes how the quantum foam gets into the void.

...so you're tellin me there's a chance...

We are still trying to figure out dark matter, but that would be cool.

[removed]

You're kind of right. We live in the expanding cloud of the "explosion" (not an explosion) and everything we can see and measure is really just facets and manifestation of that explosion (not an explosion) that could be just as easily though of as "ripples" as anything else.

Now, whether we're expanding "into" anything, or across the surface of anything is anyone's guess. We don't really know what lies beyond / below the universe, whether there's some larger "structure" that hosts the multiverse or not. M-Theory says there is, but we haven't any experiments to verify M-Theory, at least, not yet.

You would need to send an absolutely massive amount of water into space to make an appreciable difference. Like, imagine taking an inch of water and then multiplying it by the entire surface of the ocean.

They do have to worry about the US government. "You can export restricted satellite technology for communications" is not the same permission as "You can export restricted satellite technology to guide bombs." Dual-use tech is a fun area of ITAR regulations.

Antarctica alone loses 220 gigatons of ice per year. To counter that, we would have to launch SLS, the most powerful currently operational rocket, about 25 million times a year.

True. Then maybe it could be dark matter/energy?

[removed]

[removed]