“Over a decade\u2019s worth of NASA\/ESA Hubble Space Telescope data was used to re-examine the long-held prediction that the Milky Way galaxy will collide with the Andromeda galaxy in about 4.5 billion years. The astronomers found that, based on the latest observational data from Hubble as well as the Gaia space telescope, there is only a 50-50 chance of the two galaxies colliding within the next 10 billion years. The study also found that the presence of the Large Magellanic Cloud can affect the trajectory of the Milky Way and make the collision less likely. The researchers emphasize that predicting the long-term future of galaxy interactions is highly uncertain, but the new findings challenge the previous consensus and suggest the fate of the Milky Way remains an open question.<\/p>\n\n\n\n
As far back as 1912, astronomers realized that the Andromeda galaxy \u2014 then thought to be only a nebula \u2014 was headed our way. A century later, astronomers using the NASA\/ESA Hubble Space Telescope were able to measure the sideways motion of Andromeda and found it was so negligible that an eventual head-on collision with the Milky Way seemed almost certain.<\/p>\n\n\n
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<\/a>Credit:<\/strong> NASA, ESA, STScI, Till Sawala (University of Helsinki), DSS, J. DePasquale (STScI)<\/em><\/p>\n\n\n\n A smashup between our own galaxy and Andromeda would trigger a firestorm of star birth, supernovae, and maybe toss our Sun into a different orbit. Simulations had suggested it was inevitable.<\/p>\n\n\n\n However, a new study using data from Hubble and ESA\u2019s Gaia<\/a> suggests this may not necessarily be the case. Researchers combining observations from the two space observatories re-examined the long-held prediction Milky Way \u2013 Andromeda collision, and found it is far less inevitable than astronomers had previously suspected. <\/p>\n\n\n\n \u201cWe have the most comprehensive study of this problem today that actually folds in all the observational uncertainties,\u201d<\/em> said Till Sawala<\/strong>, astronomer at the University of Helsinki in Finland and lead author of the study<\/a>, which appears today in the journal Nature Astronomy.<\/em><\/p>\n\n\n\n His team includes researchers at Durham University, United Kingdom; the University of Toulouse, France; and the University of Western Australia. They found that there is approximately a 50-50 chance of the two galaxies colliding within the next 10 billion years. They based this conclusion on computer simulations using the latest observational data.”<\/p>\n\n\n\n Sammanfattningsvis: I HST-pressmesset bed\u00f6ms risken\/chansen f\u00f6r en krock kommande 10 miljarder \u00e5r som fifty-fifty.<\/p>\n\n\n Till Sawala<\/em><\/p>\n\n\n\n P\u00e5 Instagram propagerar v\u00e5r SN-professor Jesper Sollerman <\/strong>i Stockholm f\u00f6r studier vid universitet. <\/p>\n\n\n\n Instagramkontot h\u00e4r.<\/a><\/p>\n\n\n\n Astronomer har f\u00f6r f\u00f6rsta g\u00e5ngen bevittnat en v\u00e5ldsam kosmisk kollision d\u00e4r en galax genomborrar en annan med intensiv str\u00e5lning. Forskarnas resultat, som publicerats i tidskriften Nature<\/em>, visar att denna str\u00e5lning h\u00e4mmar den skadade galaxens f\u00f6rm\u00e5ga att bilda nya stj\u00e4rnor. I den nya studien kombinerades observationer fr\u00e5n European Southern Observatory’s Very Large Telescope (ESO:s VLT) och Atacama Large Millimeter\/submillimeter Array (ALMA), vilket avsl\u00f6jar intrikata detaljer i denna galaktiska strid.<\/p>\n\n\n\n Pressmeddelandet med bilder och filmer finns p\u00e5:![\"\"](\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2025\/06\/till.jpg\")
<\/a><\/figure><\/div>\n\n\nJesper lockar till studier<\/h2>\n\n\n\n
“Kosmisk tornerspel”: astronomer observerar galaxer i kosmisk kamp<\/h2>\n\n\n\n
https:\/\/www.eso.org\/public\/sweden\/news\/eso2509\/<\/a><\/p>\n\n\n\n