If anyone begins to feel trapped in a cage, please don't just yet. For instance, astronomers currently estimate on the order of 10¹² planets in Milky Way alone,

If anyone begins to feel trapped in a cage, please don't just yet. For instance, astronomers currently estimate on the order of 10¹² planets in Milky Way alone, of which up to 11 billion could be Earth-sized and orbiting Sun-like stars [1]. So there's still plenty to explore/colonize, especially if you include the few tens of neighboring galaxies. [1] https://en.wikipedia.org/wiki/Milky_Way#Contents https://en.wikipedia.org/wiki/Milky_Way#Contents