Tag Archives: Hipparcos

Stories of the stars

Gaia, the billion star surveyor. This is the mission slogan. A billion stars. One thousand million stars… That is a lot. Really a lot of stars. If the final catalogue with just the summary of all data accumulated by Gaia were printed and all volumes were nicely aligned in my bookshelf, the row of 53,542 volumes would extend 1.3 km (and this would only be the summary data of all non-special stars). So, I hope you appreciate the point that a billion stars is really a lot. This is also what one of the space enthusiasts that visited the open day of the European Space Research and Technology Centre (ESTEC) a few...

Gaia – Surveying a billion stars

Welcome to ESA’s Gaia blog! Gaia is a global space astrometry mission. It will make the largest, most precise three-dimensional map of our Galaxy by surveying more than a thousand million stars. In this blog we’ll cover the activities from Kourou from once the spacecraft has left the clean room in Toulouse until launch. And we’ll include guest blogs from outside of Kourou – to give you an idea of the other things that are happening in the wider Gaia community. Details shortly…Watch this space!