Our second astronomical gift is … two giant bubbles! With the Fermi spacecraft, scientists found out that our Milky Way galaxy is blowing bubbles — two of them! Each bubble is about 25,000 light-years tall and glows in gamma rays. tmblr.co/Zz_Uqj2dMNkMX #NASAUniverse
Did you know our Milky Way galaxy is blowing bubbles? Two of them, each 25,000 light-years tall! They extend above and below the disk of the galaxy, like the two halves of an hourglass. We can’t see...
