![](\"http:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2018\/04\/rotation_of_the_large_magellanic_cloud2\/17490323-1-eng-GB\/Rotation_of_the_Large_Magellanic_Cloud_small.jpg\")
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\nLast week the much-awaited second slew of data from ESA\u2019s Gaia mission was released, providing information on a phenomenal 1.7 billion stars \u2013 the richest star catalogue to date.\n<\/p>\n
\nTo put that vast number into context, if you were to count \u2018only\u2019 to one billion at a rate of one count per second, it would take more than 30 years. The new data will surely keep astronomers busy for even longer.\n<\/p>\n
\nThe dataset has already revealed fine details about the make-up of the Milky Way\u2019s stellar population and about how stars move, essential information for investigating the formation and evolution of our home Galaxy.\n<\/p>\n
\nThe treasure trove of data also includes information about stars beyond our own Galaxy. One example is illustrated in this image, which focuses on one of the nearest galaxies to our Milky Way, the Large Magellanic Cloud, or LMC.\n<\/p>\n
\nThis image combines the total density of stars detected by Gaia in each pixel with information about the proper motion of stars \u2013 their velocity across the sky \u2013 which is represented as the texture of the image, giving it a fingerprint-like appearance.\n<\/p>\n
\nMeasuring the proper motion of several million stars in the LMC, astronomers were able to see an imprint of the stars rotating clockwise around the centre of the galaxy. The impression of motion is evoked by the swirling nature of the line texture.\n<\/p>\n
\nAstronomers are interested to derive the orbits of globular clusters \u2013 ancient systems of stars bound together by gravity and found in the halo of the Milky Way \u2013 and dwarf galaxies that revolve around the Milky Way. This will provide all-important information to study the past evolution of our Galaxy and its environment.\n<\/p>\n
\nA similar view based on the total amount of radiation detected by Gaia and colour information about the stars is available here<\/a>, and an animated view of the rotation of stars within the Large Magellanic Cloud is available here<\/a>. \n<\/p>\n \nRead more about Gaia\u2019s latest data release here<\/a>.\n<\/p>\n \nAcknowledgement: Gaia Data Processing and Analysis Consortium (DPAC); A. Moitinho \/ A. F. Silva \/ M. Barros \/ C. Barata, University of Lisbon, Portugal; H. Savietto, Fork Research, Portugal; P. McMillan, Lund Observatory, Sweden<\/p>\n","protected":false},"excerpt":{"rendered":" \nLast week the much-awaited second slew of data from ESA’s Gaia mission was released, providing information on a phenomenal 1.7 billion stars – the richest star catalogue to date.\n<\/p>\n \nTo put that vast number into context, if you were to count ‘only’ to one billion at a rate of one count per second, it would take more than 30 years. The new data will surely keep astronomers busy for even longer.\n<\/p>\n \nThe dataset has already revealed fine details about the make-up of the Milky Way’s stellar population and about how stars move, essential information for investigating the formation and evolution of our home Galaxy.\n<\/p>\n \nThe treasure trove of data also includes information about stars beyond our own Galaxy. One example is illustrated in this image, which focuses on one of the nearest galaxies to our Milky Way, the Large Magellanic Cloud, or LMC.\n<\/p>\n \nThis image combines the total density of stars detected by Gaia in each pixel with information about the proper motion of stars – their velocity across the sky – which is represented as the texture of the image, giving it a fingerprint-like appearance.\n<\/p>\n \nMeasuring the proper motion of several million stars in the LMC, astronomers were able to see an imprint of the stars rotating clockwise around the centre of the galaxy. The impression of motion is evoked by the swirling nature of the line texture.\n<\/p>\n \nAstronomers are interested to derive the orbits of globular clusters – ancient systems of stars bound together by gravity and found in the halo of the Milky Way – and dwarf galaxies that revolve around the Milky Way. This will provide all-important information to study the past evolution of our Galaxy and its environment.\n<\/p>\n \nA similar view based on the total amount of radiation detected by Gaia and colour information about the stars is available here<\/a>, and an animated view of the rotation of stars within the Large Magellanic Cloud is available here<\/a>. \n<\/p>\n<\/p>\n