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Charting Troubled Galactic Waters
BBC Sky at Night Magazine
|November 2017
The origins of the never-seen stars on the outskirts of our Galaxy are causing problems for galactic researchers.
The edge of the galactic disc is a complicated place, with the Milky Way’s own stars mixed with the remnants of myriad tiny satellites, ripped apart and consumed by our Galaxy’s gravity. A new paper by an international team uses data from the Sloan Digital Sky Survey to take a look at what might be just such a remnant, a structure known as Triangulum-Andromeda after the part of the sky in which it’s located.
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