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Interestingly, all of those supposed spheres are around dwarf stars, which make them inherently more practical for two reasons: 1) Much less material required
by A_D_E_P_T 2y ago
Interestingly, all of those supposed spheres are around dwarf stars, which make them inherently more practical for two reasons:
1) Much less material required
2) Much longer star lifespan (trillions of years rather than a handful of billions)
However, what's interesting is that those spheres all seem to be around red dwarf stars, which are much more active and shorter-lived than white dwarfs. They're just not as stable.
Our nearest neighbor, Proxima Centauri, is a violently active flare star -- and it's also a red dwarf with an estimated lifespan of ~4 trillion years.
- ChrisMarshallNY 2y ago> red dwarf stars, which are much more active and shorter-lived than white dwarfs. I was under the impression that red dwarfs are the longest-lived stars.
- A_D_E_P_T 2y agoOn the main sequence, yeah. But white dwarfs -- which are technically stellar remnants -- are indefinitely stable. They just keep cooling. It's surmised that they'll still be quite a lot warmer than the universe's background temperature in 10^15 years. This has yet to be observed, but red dwarf stars, when they reach the end of their lifespan, should contract and become white dwarfs. It's said that our sun will also eventually end up as a white dwarf. White dwarfs are superlatively stable, long-lived, and quite hot. And there are already quite a lot of them. If you're going to build a Dyson sphere/swarm, they're a very good choice. Though red dwarfs aren't bad...