Only massless 'stuff' can cross space at 300 million meters per second. But the 'meters' might be subject to compression. See science fiction, our only lodestone now. Galaxies may have zero to a billion civilizations; a range of estimates that stands near useless. Anyway, this galaxy has at least one. Civilizations might communicate via electromagnetic fields (at 'C'), but the vast distances and 'one over R squared' dispersal of energy make that seem a waste of time and effort. The possibility of meeting is tied to the possibility of distorting space. More advanced civilizations might be meeting even now. Or destroying each other out of fear (see Liu Cixin). If they notice us and what we say and do, well, we might not attract their attention.
I saw something about an earth-like planet in the news, a possible candidate for colonization. Believe it’s this: James Webb Space Telescope suggests this exoplanet is our 'best bet' at finding an alien ocean | Space Some features: 1. you’d weigh approximately 50% more than on earth. Good for building muscle tone? 2. It’s got one side perpetually facing its sun. 3. Radiation from its sun(s) is significantly higher. Yup, two suns. this Mecca is also 48 light years distant, and not being light, to get there at a acceleration rate we could muster, and survive, it would take us, well our distant offspring, a large number of years to get there. AI’s telling me millions, with current tech… who’s up for a road trip?
