Yes, it is theoretically possible for our solar system to be ejected from the Milky Way galaxy, although the chances of this happening are extremely low. The ejection would require a powerful gravitational interaction or a close encounter with a massive object such as a black hole or another galaxy.
The Milky Way galaxy is held together by the combined gravitational pull of all its stars, gas, and dark matter. Our solar system orbits around the center of the Milky Way, along with billions of other stars. For our solar system to be expelled from the galaxy, it would need to acquire enough energy to overcome the gravitational binding of the Milky Way.
There are a few hypothetical scenarios in which the solar system could potentially be ejected. One possibility is a close encounter with a rogue star or a binary star system passing near our solar system. The gravitational interaction could disrupt the orbits of planets and potentially fling the solar system out of the Milky Way.
Another scenario involves the merger of our galaxy, the Milky Way, with another galaxy. When galaxies collide, gravitational interactions can cause significant disruptions and interactions between stars and planetary systems. If our solar system were to be near the outskirts of the merging galaxies, it could potentially be slingshotted out of the resulting merged galaxy.
However, it's important to note that these events are highly improbable. The distances between stars in the galaxy are vast, and the likelihood of a close encounter with a massive object is extremely low. Additionally, the gravitational forces binding the solar system to the Milky Way are quite strong. Therefore, while it is technically possible for our solar system to be ejected from the galaxy, the chances of it happening are considered highly unlikely.