On 31 March 2017, Jupiter’s moon Europa passed in front of a background star – a rare event that was captured for the first time by ground-based telescopes thanks to data provided by ESA’s Gaia spacecraft.
The first direct measurement of the bar-shaped collection of stars at the centre of our Milky Way galaxy has been made by combining data from ESA’s Gaia mission with complementary observations from ground- and space-based telescopes.
A visualisation of the orbits of asteroids observed by ESA’s Gaia satellite, including four recent discoveries
While ESA’s Gaia mission has been surveying more than one billion stars from space, astronomers have been regularly monitoring the satellite’s position in the sky with telescopes across the world, including the European Southern Observatory in Chile, to further refine Gaia’s orbit and ultimately improve the accuracy of its stellar census.
Space Science Image of the Week: While charting the stars, Gaia also observes asteroids and occasionally spots new ones
Measurements from Hubble and Gaia improve our estimate of the mass of our Galaxy: 1.5 trillion solar masses
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.
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.
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
ESA’s Gaia mission has made a major breakthrough in unravelling the formation history of the Milky Way.