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Comment by hutzlibu | Hacker News Reader

"Also considering that there has been a lot of investment in space launch vehicles of late the cost to lift things into orbit are lowering."

Yes, but the cost of installing solar panels on the ground are astronomically cheaper than anything you can do in space and I do not see the gap closing in the near future, even with breakthroughs. Rather the contrary, we still have lots of cheap unused land (deserts). And solar panels are getting cheaper every day. Having a space based laser/power beam sounds cool - but complicated and expensive.

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The applications for this are well beyond Earth.

Additionally there was a lot more useful testing of various related aspects in this beyond just beaming power to Earth per the article.

Oh the technology per se is definitely something amazing, that warrants more research. I was just referring to this question of the thread, of can this be a useful energy source for the earth in the near future? And I think no. Rather fusion, even though that will likely take some more decades at least. But a breakthrough with fusion seems possible, but I cannot think of a breakthrough with space beams, that can ignore the atmosphere, or gravity (the main constraints).

Fair enough.

Near future, I agree it's hard to imagine available resources for this outpacing available resources for fusion.

Though fusion does have some more difficult technical engineering issues than SBS.

By that I mean, as far I know, we have a decent understanding of what materials we would need and how to utilize said material for space based solar.

While with fusion we are close to self sustainings reactions, we still lack understanding on containing the reaction itself for it to be feasible. That is, understanding the magnetic fluctuations around the plasma reaction and having material to housing it for extended periods of time.

Of course with computing simulations becoming increasingly more accurate and powerful, those technical hurdles may not be as stringent as we see them today.

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