The Canis Major Dwarf Galaxy is a small irregular galaxy located approximately 25,000 light-years away from Earth in the constellation Canis Major. It is believed to be the closest neighboring galaxy to the Milky Way and is gradually being pulled apart by the Milky Way's gravitational forces. Despite its proximity, it's challenging to observe due to its proximity to the galactic plane and the obscuring dust and gas of the Milky Way.