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Science & Technology Topics. Gaia mission. News and more


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Wed, 07 Apr 2021 15:00:00 GMT


12 rare Einstein crosses discovered with Gaia
Posted on Wed, 07 Apr 2021 15:00:00 GMT

Author : Science & Technology

Thanks to ESA's star mapping spacecraft Gaia and machine learning, astronomers have discovered 12 quasars whose light is so strongly deflected by foreground galaxies that they are each visible as four distinct images, called an 'Einstein cross'. These crosses are unique tools to learn more about dark matter and the expansion rate of the Universe.



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Thu, 03 Dec 2020 08:00:00 GMT


Gaia's new data takes us to the Milky Way's anticentre and beyond
Posted on Thu, 03 Dec 2020 08:00:00 GMT

Author : Science & Technology

The motion of stars in the outskirts of our galaxy hints at significant changes in the history of the Milky Way. This and other equally fascinating results come from a set of papers that demonstrate the quality of ESA's Gaia Early third Data Release (EDR3), which is made public today.



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Mon, 25 May 2020 15:00:00 GMT


Galactic crash may have triggered Solar System formation
Posted on Mon, 25 May 2020 15:00:00 GMT

Author : Science & Technology

The formation of the Sun, the Solar System and the subsequent emergence of life on Earth may be a consequence of a collision between our galaxy, the Milky Way, and a smaller galaxy called Sagittarius, discovered in the 1990s to be orbiting our galactic home.



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Mon, 02 Mar 2020 15:00:00 GMT


Milky Way's warp caused by galactic collision, Gaia suggests
Posted on Mon, 02 Mar 2020 15:00:00 GMT

Author : Science & Technology

Astronomers have pondered for years why our galaxy, the Milky Way, is warped. Data from ESA's star-mapping satellite Gaia suggest the distortion might be caused by an ongoing collision with another, smaller, galaxy, which sends ripples through the galactic disc like a rock thrown into water.



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Tue, 21 Jan 2020 08:58:00 GMT


Global Gaia campaign reveals secrets of stellar pair
Posted on Tue, 21 Jan 2020 08:58:00 GMT

Author : Science & Technology

A 500-day global observation campaign spearheaded more than three years ago by ESA’s galaxy-mapping powerhouse Gaia has provided unprecedented insights into the binary system of stars that caused an unusual brightening of an even more distant star.



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Wed, 28 Aug 2019 10:27:00 GMT


Gaia untangles the starry strings of the Milky Way
Posted on Wed, 28 Aug 2019 10:27:00 GMT

Author : Science Portal

Rather than leaving home young, as expected, stellar 'siblings' prefer to stick together in long-lasting, string-like groups, finds a new study of data from ESA's Gaia spacecraft.



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Thu, 25 Jul 2019 15:04:00 GMT


Astronomers spy Europa blocking distant star – thanks to Gaia
Posted on Thu, 25 Jul 2019 15:04:00 GMT

Author : Science Portal

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.



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Tue, 16 Jul 2019 15:00:00 GMT


Gaia starts mapping our galaxy’s bar
Posted on Tue, 16 Jul 2019 15:00:00 GMT

Author : Science Portal

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.



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Fri, 17 May 2019 09:33:00 GMT


Shedding light on white dwarfs – the future of stars like our Sun
Posted on Fri, 17 May 2019 09:33:00 GMT

Author : Science Portal

ESA's Gaia mission has been busy mapping our Milky Way galaxy since 2014, and just over one year ago released its second batch of data on more than one billion stars. Since then, astronomers have been exploring this catalogue to reveal a huge amount of new information about the cosmos. One type of object that has seen an abundance of new discoveries is white dwarfs.



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Thu, 02 May 2019 13:14:00 GMT


Observing Gaia from Earth to improve its star maps
Posted on Thu, 02 May 2019 13:14:00 GMT

Author : Science Portal

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.


 

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