11–20 of 79 posts
Posted it because it reminds me of an hypothesis I once saw, that we might be able to detect alien civilizations based on blank spots in the sky where they've managed to divert all the energy from their environment.
Posted it because it reminds me of an hypothesis I once saw, that we might be able to detect alien civilizations based on blank spots in the sky where they've managed to divert all the energy from their environment.
It might not be as empty as it looks. Maybe it’s just got a really big dark sheet over it. Astronomers don’t consider the possibility of ginormous dark sheets in space.
One direction, nothing whatsoever.
The other direction, billions upon billions of galaxies.
Would be neat!
Posted it because it reminds me of an hypothesis I once saw, that we might be able to detect alien civilizations based on blank spots in the sky where they've managed to divert all the energy from their environment.
I've heard this idea in the context of Dyson spheres/swarms. The issue is that, while they'd be invisible or dim to the eye, the areas would be very bright in infrared.
Really though, a Dyson’s swarm isn’t that efficient long term. It’s likely better to dismantle large stars and use fusion reactors with heat sinks at close to 2.73 Kelvin as possible.
Voids aren’t empty they just have less stuff in them. There’s galaxies and things in there.
Sometimes I wonder about the percentage of HN commenters who actually read the article. Literally a few paragraphs in: “The lack of radio sources means that there are no galaxies or clusters in that volume.”
/s (just in case)
Posted it because it reminds me of an hypothesis I once saw, that we might be able to detect alien civilizations based on blank spots in the sky where they've managed to divert all the energy from their environment.
Probably more in the domain of god - if you believe in that sort of thing - than aliens.
Voids aren’t empty they just have less stuff in them. There’s galaxies and things in there.
Sometimes I wonder about the percentage of HN commenters who actually read the article. Literally a few paragraphs in: “The lack of radio sources means that there are no galaxies or clusters in that volume.”
Voids aren’t empty they just have less stuff in them. There’s galaxies and things in there.
Sometimes I wonder about the percentage of HN commenters who actually read the article. Literally a few paragraphs in: “The lack of radio sources means that there are no galaxies or clusters in that volume.”
This one, for instance, I’ll admit I haven’t clicked through to the article. I’ve long been interested in these voids so I didn’t figure the article would relay any information I wasn’t aware of so I clicked through to see what people here had to say.
Earlier quoted context omitted.
I'm reminded of the Three Body Problem series, where there's this concept of a Black Domain - an area of space in which the speed of light has been reduced drastically. Some civilizations in the setting have reason to deliberately construct these areas of space. (The reasoning behind this might be considered a spoiler, so I'll leave it off.)
You mean like in Vernor Vinge's 1992 A Fire Upon the Deep ?
Voids aren’t empty they just have less stuff in them. There’s galaxies and things in there.
Sometimes I wonder about the percentage of HN commenters who actually read the article. Literally a few paragraphs in: “The lack of radio sources means that there are no galaxies or clusters in that volume.”
Perhaps Dang could get analytics on how many people viewed the comments and how many people clicked through to the article to answer your question.