Themes: Galaxies
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Spiral galaxies. “All we knew was wrong”
Iris Breda explains how a new study about the composition of the disk and bulge of spiral galaxies can question part of what we know about their formation and evolution.
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![Conceção artística de um buraco negro supermassivo.](https://divulgacao.iastro.pt/wp-content/uploads/2020/07/AGN-388x220.jpg)
An optical system designed for the next X rays telescope
IA will lead the development of a precision optical system for ESA’s future space telescope dedicated to the study of extreme events in the Universe.
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![FGC1287](https://divulgacao.iastro.pt/wp-content/uploads/2023/08/FGC1287-388x218.jpg)
In a very distant galaxy: FGC 1287
What mechanism is stripping off gas away from the galaxy FGC 1287 and producing a long tail of neutral hydrogen?
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![Imagem no rádio e raios X do conjunto 3C 75](https://divulgacao.iastro.pt/wp-content/uploads/2023/08/3c75_chandraNRAO_web-388x218.jpg)
In a very distant galaxy: 3C 75
Two black holes orbit each other in the centre of collision of two galaxies, in the Abell 400 galaxy cluster.
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![Hercules A](https://divulgacao.iastro.pt/wp-content/uploads/2023/08/hercA_2012_large-web-388x218.jpg)
In a very distant galaxy: Hercules A
Hercules A is much bigger than what we see in the visible light. Observed in the radio band, it reveals the activity of a central black hole with the mass of 4 billion suns.
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![Galáxia NGC 1277](https://divulgacao.iastro.pt/wp-content/uploads/2023/08/NGC1277-web-388x218.jpg)
In a very distant galaxy: NGC 1277
It is challenging to find pristine galaxies like NGC 1277, which allows us to see what otherwise would be too far and faint.
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![As galáxias NGC 4569 e IC-3583](https://divulgacao.iastro.pt/wp-content/uploads/2021/01/NGC-4569-IC-3583-web-388x218.jpg)
In a very distant galaxy: Messier 90
Spiral galaxies NGC 4569 and IC 3583 highlight the importance of the environment to understand how galaxies evolve.
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