Gaia’s Map of 1.3 Billion Stars Makes for a Milky Way in a Bottle

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  • Call it a galaxy in a bottle.

Last Wednesday, astronomers in Europe released a three-dimensional map of the Milky Way.

  • Dennis Overbye
  • The New York Times

It is the most detailed survey ever produced of our home galaxy.

It contains the vital statistics of some 1.3 billion stars — about one percent of the whole galaxy.

Milky Way 1a ESA Gaia DPACNot to mention measurements of almost half a million quasars, asteroids and other flecks in the night.

Analyzing all these motions and distances, astronomers say, could provide clues to the nature of dark matter.

The gravity of…

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