The Nation



European satellite to map 1 billion stars

BERLIN -- The European Space Agency is preparing to launch a satellite that will produce the most accurate three-dimensional map of our part of the Milky Way.

The agency says its Gaia satellite due to launch Thursday from French Guiana at 6:12 a.m. (0912 GMT; 4:12 a.m. EST) will survey some 1 billion stars in our galactic neighborhood.

Even that is just a small fraction of the stars in the Milky Way.

Gaia will also use its 1,000-megapixel camera to hunt for planets, asteroids and comets beyond our Solar System.

ESA says scientists are hoping the satellite’s sensitive instruments can be used to test a key part of Albert Einstein’s General Theory of Relativity that predicts ``dips’’ and ``warps’’ in space caused by the gravity of stars and planets.

Associated Press

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