About Gaia
- The legend of Gaia
- Science objectives
Measuring the Milky Way
Spacecraft and Instruments
Mission Operations
Multimedia
Gaia images
Gaia animations and videos
Gaia poster
Follow us
ESA Sci on Twitter
Gaia on FB
ESA Space Science Images on Flickr

ESA > Our Activities > Space Science > Gaia

Weighing the Milky Way

Measurements from Hubble and Gaia improve our estimate of the mass of our Galaxy: 1.5 trillion solar masses

The Universe of Gaia

A taste of the exciting science that is being performed using data from ESA’s Gaia star surveyor, delving into the formation history of our Milky Way

Stellar family portrait

Explore Gaia’s second data release with this interactive visualisation of the Hertzsprung-Russell diagram, the family portrait of stars in our Milky Way

Gaia data galore

Gaia has published its much awaited second data release, with high precision measurements of nearly 1.7 billion stars

Galactic fingerprint

Space Science Image of the Week: Gaia fingerprints the stars and monitors their motion through the Universe

Replay Gaia Data Release

Gaia’s new star catalogue has been unveiled. Watch a replay of the media briefing from ILA.

Waiting for Gaia

Find out why scientists worldwide are excited about Gaia's new data and how it's going to impact all things astronomy

Latest News

Gaia clocks new speeds for Milky Way-Andromeda collision07 February 2019

Gaia clocks new speeds for Milky Way-Andromeda collision07 February 2019 ESA’s Gaia satellite has looked beyond our Galaxy and explored two nearby galaxies to reveal the stellar motions within them and how they will one day interact and collide with the Milky Way – with surprising results.

Gaia reveals how Sun-like stars turn solid after their demise09 January 2019

Gaia reveals how Sun-like stars turn solid after their demise09 January 2019 Data captured by ESA’s galaxy-mapping spacecraft Gaia has revealed for the first time how white dwarfs, the dead remnants of stars like our Sun, turn into solid spheres as the hot gas inside them cools down.

Galactic ghosts: Gaia uncovers major event in the formation of the Milky Way31 October 2018

Galactic ghosts: Gaia uncovers major event in the formation of the Milky Way31 October 2018 ESA’s Gaia mission has made a major breakthrough in unravelling the formation history of the Milky Way.

Gaia spots stars flying between galaxies02 October 2018

Gaia spots stars flying between galaxies02 October 2018 A team of astronomers using the latest set of data from ESA’s Gaia mission to look for high-velocity stars being kicked out of the Milky Way were surprised to find stars instead sprinting inwards – perhaps from another galaxy.

Gaia finds candidates for interstellar ‘Oumuamua’s home25 September 2018

Gaia finds candidates for interstellar ‘Oumuamua’s home25 September 2018 Using data from ESA’s Gaia stellar surveyor, astronomers have identified four stars that are possible places of origin of ‘Oumuamua, an interstellar object spotted during a brief visit to our Solar System in 2017.

Gaia hints at our Galaxy’s turbulent life19 September 2018

Gaia hints at our Galaxy’s turbulent life19 September 2018 ESA’s star mapping mission, Gaia, has shown our Milky Way galaxy is still enduring the effects of a near collision that set millions of stars moving like ripples on a pond.

News Archive

ESA

ESA Science

Gaia

About Gaia

Measuring the Milky Way

Spacecraft and Instruments

Mission Operations