Satellite to map Milky Way

Last updated 08:12 20/12/2013

The European Space Agency launches its GAIA satellite on a mission which it says "will have the key to unlocking the Milky Way galaxy".

BIG JOB: An artist's impression shows Gaia mapping the stars of the Milky Way.

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The European Space Agency has launched a satellite that it hopes will produce the most accurate three-dimensional map of our part of the Milky Way galaxy.

The agency says its Gaia satellite was lifted into space aboard a Russian-made Soyuz carrier system from French Guiana at 6.12am on Thursday (local time).

Gaia is heading to a stable orbit called the Lagrange 2 point where Earth will shield it from the Sun.

Once it arrives, the satellite will begin its mission to survey some 1 billion stars in Earth's galactic neighbourhood.

Gaia will also use its 1000-megapixel camera to hunt for planets, asteroids and comets beyond our Solar System, and test a key part of Albert Einstein's General Theory of Relativity.

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- AP

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