How scientists learned there's more than one galaxy in the universehttp://www.vox.com/2016/11/20/13677046/edwin-hubble-andromeda-galaxy …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
How scientists learned there's more than one galaxy in the universehttp://www.vox.com/2016/11/20/13677046/edwin-hubble-andromeda-galaxy …