How Do Stars Go Rogue?

In answer to your question, what would life be like if we were following a rogue star out of the galaxy, I think the answer would depend upon a number of factors, the main one being would our solar system remain intact, or would all the planets change their orbital distance? I'm not sure if the gravitational center of the Milky Way has as much effect on the orbits of planets around the sun as it does on the orbit of the sun around the center of the Milky Way. Assuming the sun was flung into open space with all the orbits of its planets intact, I don't think we'd notice much more than the gradual shift of the positions of stars in the night sky as we drifted away from The Milky Way. Once we were far enough away from the Milky Way, eventually the night sky would be devoid of most of its stars, and only a few rogue stars and other galaxies would be visible at night. For some time, we'd be treated to an incredible outside view of the Milky Way. Naturally, this also assumes we were not flung into another star on our way into never never land. Thinking about the cause of such a solar fling, it would likely be the result of a high powered, nearby star exploding that would cause this, and such explosion would likely affect the planets and their orbits as well. If the Earth was flung from the sun in the process, the Earth would eventually lose its solar energy supply from the sun, eventually ending all life on our planet. A few people in underground shelters would survive a little longer, but eventually those too would succumb to the cold.