gaia

How we’re helping the Gaia mission map a billion stars to unparalleled precision

How we’re helping the Gaia mission map a billion stars to unparalleled precision

The positions and velocities of a billion stars in our own galaxy have been released, measured to a precision never achieved before. The data, obtained by the European Space Agency’s Gaia spacecraft is a milestone in stellar cartography. The brightest stars will eventually be measured to the nearest five-hundred-millionth of a degree. That’s like using a telescope in London to see the width of a human hair in Rome.