![TESS snapshots of part of the southern sky showing the location of ν Indi, the plane of the Milky Way and the southern ecliptic pole. A snapshot from TESS of part of the southern sky showing the location of ν Indi (marked by the blue circle), the plane of the Milky Way (bottom left) and the southern ecliptic pole (top). These snapshots come from data collected in TESS observing sectors 1, 12 and 13 Credit: J. T. Mackereth.](/sites/default/files/styles/crop_square_2_2_to_320px/public/images/news/Nu-Indi_final.png?itok=3d9Gbs8W)
Earlier this year, a team of astrophysicists has revealed new insights on an ancient collision that our galaxy the Milky Way underwent with another smaller galaxy called Gaia-Enceladus early in its history. However the details on how and when that collision happened are not precisely known. The study of a single bright star called nu Indi, for which data from the NASA mission TESS (Transiting Exoplanet Survey Satellite), the ESA Gaia mission, and ground-based observations were combined, led to better characterize this event. Indeed, by applying a novel approach based on asteroseismology
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