Limited Supplies in Our Cosmic Future

I am sorry to be the bearer of bad cosmic news. But our supplies are limited in the <a href="https://arxiv.org/pdf/astro-ph/0107568.pdf" rel="noopener ugc nofollow" target="_blank">long-term future of the Universe</a>. If we stay within our host Milky-Way galaxy, the supplies would at most double after the <a href="https://watermark.silverchair.com/mnras0386-0461.pdf?token=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAA38wggN7BgkqhkiG9w0BBwagggNsMIIDaAIBADCCA2EGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMWRYBhdg2YHGAoHIiAgEQgIIDMm55R_EkFxagLCowd9cG1jGjWGc1bjUuwlbB-7CrDxwrIZb13Qpf8UYSoc-Dx0Duc4kquhRBRzrt6jI9ZKuQRkSAuB1SNOUsJ0PYJHj3cQXEOEXkH39rltRD1dM_KklZ24YVStFTy3GOrLXoNYa-kfKLMdb5hcCDcbc7zDVzLZB42PgiFFb8rrntZ1B0Ed_Bi5i69z7Ods6NstiaRrokM_wQH-wNCWIqW1LJ2GZ2KQH_lOOVRdXHYnho73hifKKo5DxV7WogwtpTEmfJ_JgXA_htu7UxiyzLWaI8lmaMdFTk4BY2h9FMQ67kMLJ9PVgS2opAfQUQa_UF2ikc8gooWQG-KjqDiUGa5QCQBX4TB3tYXuddy8Eji_-_3Pa0A23Bz1win_eQxZ0uFZxGqRaXzWs99PUgkI7gHiR3mHuaPwFzk6uvnAsj5nybIIqVYjtgDD1LxsBVoWLZHQ4Fv5QZPLiqWvu9L4l0dceGoZKONY8k7ljs8Q9NqIy59vN0PElAOWvw7CquhX4_yGi3Jcpo1WX_JKRceDMb-B36vTjU4TEbpO_5r-hkWe9VLrsc_uIUyIdSi2LthK_RcbdXlxMtPn4o2LdDv1dRm4BhAmXjFeeeXHWL85eacJPUnFopHfvqtYJ0-eM1cJJsrhTzAm6pchWWBK2mwtHHcZwOXvNQYCLGqKMItN26-Z5osKOl121qgq-rADP55ezBtkHksr7dRz5ZqSRX_Z99rXU2I6YZjqs_wjkrGHt6GfbHlZ-TEJVP7q0ww_eKs1e2Y7uTQgl6AOQ3RX48oSJszAkmUJkvZfP4K1SYe35S85gsVkdzUAsxxw8MfM9TUDC_V8zgZn1s2VlRq-Pvkgp7Cf4qX6sZy5Q7oJ8dIJRoPh7pGCC1K2gWJyNS7Tuomz3oAGd2SbwrTnC1F0kVRXn1PT_Bw9y9uRjydhOsSqcTJJpKY4TzAwVntQsC65j5FDcAzPReXa6ebDNtMCtmDCJxOi4FuCwDjovJtH5RVIM2iLinTiYYDeIB3hLfOUkEhV78UPLvLY-n8FxrK8q4iwktCmym8-oZ2bWZ39XWiaKuFVCje-pe2BUDY5pF" rel="noopener ugc nofollow" target="_blank">merger</a> with our sister galaxy, Andromeda, in a few billion years. But beyond that time, the standard cosmological model forecasts that our reservoir will not grow much even if we wait forever. In a <a href="https://arxiv.org/pdf/astro-ph/0310505.pdf" rel="noopener ugc nofollow" target="_blank">paper</a> that I wrote with my former postdoc, Ken Nagamine, we simulated the motion of all nearby systems and demonstrated that all other galaxies will be carried away from us by the cosmic expansion. If the Universe had been dominated by matter, the matter’s attractive gravity would have slowed down the cosmic expansion. This, in turn, would have implied that by boarding a fast-enough spacecraft we would have been able to reach any galaxy within our cosmic horizon, <a href="https://avi-loeb.medium.com/limited-supplies-in-our-cosmic-future-729b4c568e2f">Learn More</a>