Our galaxy has greater than before its diameter is ten times

The astronomers, led by John Stoke by the University of Colorado at Boulder (USA), reported that the new observations spectrograph Space Telescope "Hubble" forced them to rethink the size of the halo of spiral galaxies such as our Milky Way. So - and significantly change our estimates of their mass.

This entire glowing disc, which we used to call the Milky Way, represents only the tip of the iceberg, nine-tenths of which are lost in the darkness. 

The mystery of spiral galaxies and their mysterious sleeves

Astronomers have discovered the largest recognized spiral galaxies and they have identified the "skeleton" of the Milky Way. Our own Milky Way, most likely, is a spiral galaxy. Indeed, our solar system and the Earth are somewhere close to one of his whiskers, pulled back the sleeves.

And almost 70% of the galaxies closest to the Milky Way are a spiral. But despite their general morphology of galaxies, such as our form and retain their characteristic features, which remains a puzzle in astrophysics. Are their sleeves in spiral galaxies? Whether they can appear and disappear over time?