A new understanding of our galaxy's structure began in an unlikely way: on Twitter. A research effort sparked by tweets led scientists to confirm that the Milky Way’s central bulge of stars forms an “X” shape. Learn more: http://go.nasa.gov/2a6k5lo | NASA - National Aeronautics and Space Administration

30 years ago, NASA's Hubble Space Telescope unlocked a window to the universe. Through that window we’ve seen the wonders of our Milky Way and expanded our vision across the galaxy. Explore some of these incredible discoveries about the galaxy we call home: https://go.nasa.gov/2NYGwLO | NASA - National Aeronautics and Space Administration