Australian Sky & Telescope (Digital)

Australian Sky & Telescope (Digital)

1 Issue, March 2023

The Gaia revolution

The precise observations of Europe's prolific sky surveyor have enabled astronomers to map the universe and unravel the history of our Milky Way Galaxy.
The Gaia revolution
ASK SOMEONE TO NAME a revolutionary space telescope right now, and they will probably answer ‘James Webb’. Ever since its launch in December 2021, this versatile successor to the Hubble Space Telescope has been stealing the astronomical limelight. But operating from the same part of the Solar System, some 1.5 million kilometres behind Earth's nightside, is a lesser-known instrument that is one of the most successful space science missions ever built: the European Space Agency's Gaia spacecraft. Gaia and Webb are very different. Whereas Webb is the instrument of choice to study selected astronomical objects in detail, Gaia is an all-sky surveyor. Its main mission: to collect precise data on positions, distances, motions and compositions for almost 2 billion stars and extragalactic objects. It is the ultimate astronomical measuring machine. On June…
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Australian Sky & Telescope (Digital) - 1 Issue, March 2023

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