Halo's+of+Galaxies

Explanation: Is our [|Milky Way Galaxy] surrounded by a halo of hot gas? A step toward solving this long-standing mystery was taken recently with [|Chandra] X-ray observations of nearby galaxy [|NGC 4631]. In the [|above composite picture], newly resolved diffuse [|X-ray] emission is shown in blue, superposed on a [|HST] image showing massive stars in red. Since [|NGC 4631] is similar to the [|Milky Way], this [|observation indicates] that our own Galaxy is indeed surrounded by a halo of hot X-ray emitting gas, although we are too close to clearly differentiate them from [|more nearby] extended X-ray sources. The [|clusters of massive stars] probably heat the [|halo] gas. Exactly how this gas gets ejected into a halo is a topic of [|continuing research]. manuel did this



what are halos of galaxies? **Can anyone explain to me?**
 * thanks-kaylee g.**