Millennium Nucleus for the

Evolutionary Reconstruction of the InterStellar medium (ERIS)

Project description

ERIS applies one of the principles of Darwin’s Theory of Evolution – descent with modification – to cosmic evolution.

With ERIS we aim to reconstruct the evolution of galaxies like the Milky Way using the phylogenetic trees, which are already extensively used in other evolutionary studies on Earth. Since trees are mathematical structures and graphs, with ERIS we are consolidating an interdisciplinary collaboration between astronomers, biologists and mathematicians, in order to achieve our goal. We will reconstruct the evolution of the Milky Way, our main galactic laboratory, by building and interpreting phylogenetic trees that are appropriate for astronomical data. To do so, we will simulate the evolution of galaxies, where we know their shared history. We will also use observed data, which will allow us to learn to deal with uncertainties, and ultimately help us to constrain the theory of galaxy evolution.

On-going projects

Phylogenetic signal in spectroscopic surveys. One of the main motivations to generate large spectroscopic surveys

What do phylogenetic trees tell us about the merging history of the Milky Way?  Building

Cosmic phylogeny from first principles. Fossil data is extremely imperfect. In addition to limited and


Our team

More information about us and the rest of the team.


La astrónoma chilena Paula Jofré, directora del Núcleo Milenio ERIS y autora del libro “Fósiles del Cosmos”, es la protagonista de un …

Patricia Tissera, astrónoma y codirectora del Núcleo Milenio ERIS, asistió al III Workshop SAN del Network Southern Astrophysics (SAN) el pasado 25 …

Álvaro Rojas, Investigador Principal (PI) de Núcleo Milenio ERIS se reunió recientemente en Edimburgo junto a otros profesionales para planificar el trabajo …

Interdisciplinary work beyond the scientific community:

Gen universal