Andromeda reaches out to touch Milky Way
Gaseous halo extends 1 million light-years from neighboring galaxy’s spiral disk
![Andromeda galaxy](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/05/cc_andromeda_free.jpg?fit=860%2C460&ssl=1)
LIVING IN A BUBBLE The Andromeda galaxy, the closest spiral to the Milky Way, is embedded in a tenuous bubble of gas that extends halfway to our galaxy.
Adam Evans/Flickr (CC BY-NC 2.0)