Answer:
GAIA is an amazing telescope which can precisely measure and map the location of numerous (billions) of stars with perfect accuracy.
One of the major importance of GAIA is that it can give better information about stellar history and evolution.
This mapping helps in the prediction of the colours of different stellar, the brightening as well as the dimming of various stars etc.
In the future, the astronomers hope that this GAIA mapping will lead to the three-dimensional mapping of the space along with mapping their movements.
