Another solution is to travel from Vermohol. Wormhole is a theoretical shortcut that connects two points of space. Their existence is not certified, but it is theoretically possible. It is feasible to travel through any distance. You can enter one end of the warmhole and as soon as you wake up, you can go to another galaxy or another planetarium. We do not have the mechanism to make such wormholes. To achieve the techno-mechanism of making human civilization a warmhole, it is necessary to develop a thousand or millions of years of technical development.
The civilization that created such a shortcut will not be thousands of millions of years ahead of us. Why would such a developed civilization take interest in the earth? For them, we will be the creatures of a primitive / stone age. They will not be interested in any of our items (because they will be able to create everything in the jokes, there is no shortage of resources like water, minerals, water in the space, they will be able to achieve them like this. They will not be required to make slaves even as they have an army of Roboto to do all their work.
For a developed civilization that can create Vermohol, we will not be more than a worm crocodile. Do you think that you are interested in any of your friends, or group of chieftains? Do you think of invading them?