![Mosaic with the infrared images of the six massive elliptical galaxies at halfway the life time of the Universe found in the Hubble Ultra Deep Field. The images reveal the stellar envelopes, as well as potential satellite galaxies. Credits: Ignacio Trujil Mosaic with the infrared images of the six massive elliptical galaxies at halfway the life time of the Universe found in the Hubble Ultra Deep Field. The images reveal the stellar envelopes, as well as potential satellite galaxies. Credits: Ignacio Trujil](/sites/default/files/styles/crop_square_2_2_to_320px/public/images/gallery/news/prensa1166_2397.jpg?itok=-whX-GfM)
The most detailed study of the outskirts of massive elliptical galaxies at half the age of the Universe was carried out by an international team led by the Instituto de Astrofísica e Ciências do Espaço (IA) and with IAC participation. The study contributes to the understanding of how the largest galaxies of the Universe evolved over time.
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