![First European ALMA antenna handed over to Joint ALMA Observatory](https://cdn.eso.org/images/thumb700x/alma_3378.jpg)
First European ALMA antenna handed over to Joint ALMA Observatory
![European antennas under construction](https://cdn.eso.org/images/thumb700x/potw1122a.jpg)
European antennas under construction
![Artist’s impression of an exoplanet in a retrograde orbit (without additional graphics)](https://cdn.eso.org/images/thumb300y/eso1016c.jpg)
Artist’s impression of an exoplanet in a retrograde orbit (without additional graphics)
![Stellar titans of Pismis 24](https://cdn.eso.org/images/thumb300y/potw1015a.jpg)
Stellar titans of Pismis 24
![The CAT at La Silla](https://cdn.eso.org/images/thumb300y/ib-la-silla07.jpg)
The CAT at La Silla
![ALMA antenna at OSF backlit by the Sun](https://cdn.eso.org/images/thumb300y/ib-alma08.jpg)
ALMA antenna at OSF backlit by the Sun
![APEX image calendar, April 2010 — and everything you need to work...d we have the control room, our offices, a terrace, well](https://cdn.eso.org/images/screen/FacilitiesPano.jpg)
APEX image calendar, April 2010 — and everything you need to work...d we have the control room, our offices, a terrace, well