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https://theconversation.com/galactic-archaeologists-find-stars-in-the-milky-way-came-from-another-galaxy-12-billion-years-ago-289860>
"Look up on a dark night and the Milky Way appears as a calm band of stars
across the sky. But our galaxy has a violent past.
For more than 13 billion years it has grown through star formation and mergers
with other galaxies. We already know that several substantial galaxies helped
build the young Milky Way.
A new study, published in
Nature Astronomy, now brings one of the earliest of
these events into much sharper focus. Led by astronomer Davide Massari from the
Astrophysics and Space Science Observatory of Bologna, Italy, the team used
exceptionally precise ages of very dense clusters of stars to better determine
when this ancient merger happened, how massive the incoming galaxy was, and how
it evolved before becoming part of the Milky Way.
This takes us into one of the most formative – and most difficult to
reconstruct – periods of our galaxy’s history: its first few billion years."
Via Kenny Chaffin.
Share and enjoy,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
