How do you take a census in space?
Find out how it is possible to produce a 3D map of the galaxy, with a little help from the new Gaia Spacecraft and a whole heap of measuring.
This is the 13th cartoon in "60 Second Adventures in Astronomy" series, created for Gaia by the Open University. Narrated by David Mitchell.
More Gaia in one minute cartoons.
More "60 Second Adventures in Astronomy" cartoons.
Page last updated: 09 June 2014