The Mission

Gaia relies on the proven principles of ESA's Hipparcos mission to help solve one of the most difficult yet deeply fundamental challenges in modern astronomy: to create an extraordinarily precise three-dimensional map of about one billion stars throughout our Galaxy and beyond.

This massive stellar census will provide the basic observational data to tackle an enormous range of important problems related to the origin, structure, and evolutionary history of our Galaxy.

The Gaia mission will deliver an astronomical catalogue and data archive of unprecedented scope, accuracy and completeness.

For more information about Gaia, visit the following sections:

Science    Spacecraft & Instruments    Launch & Operations    Data Processing    Who is who in Gaia?