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More than a billion stars mapped in Milky Way: ESA
The Gaia space probe, launched in 2013, has mapped more than a billion stars in the Milky Way, vastly expanding the inventory of known stars in our galaxy, the European Space Agency said Wednesday.
Released to eagerly
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The images were captured by Gaia’s twin telescopes — scanning the heavens over and over — and a billion-pixel camera, the largest ever put into space.
The resolution is sharp enough to gauge the diameter of a human hair at a distance of 1,000 kilometres (620 miles), said Anthony Brown, head of the Gaia data processing and analysis team.
Gaia maps the position of the Milky Way’s stars in a couple of ways.
Not only does it pinpoint their location, the probe — by scanning each star multiple times — can plot their movement as well.
The data release today includes both kinds of data for some two million stars.
But over the course of Gaia’s five-year mission, that catalogue is set to expand 500-fold.
Orbiting the Sun 1.5 million kilometres (nearly a million miles) beyond Earth’s orbit, the European probe started collected data in July 2014.
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