![Great progress for the ALMA Santiago Central Office building](https://cdn.eso.org/images/thumb300y/potw1020a.jpg)
Great progress for the ALMA Santiago Central Office building
![The ALMA transporter carrying an antenna at the OSF](https://cdn.eso.org/images/thumb300y/aca_0943.jpg)
The ALMA transporter carrying an antenna at the OSF
![La Silla Observatory](https://cdn.eso.org/images/thumb300y/dsc_0087.jpg)
La Silla Observatory
![APEX image calendar, December 2010 — Chajnantor at sunrise](https://cdn.eso.org/images/thumb700x/p9040028_cc.jpg)
APEX image calendar, December 2010 — Chajnantor at sunrise
![Details of the VISTA Fornax galaxy cluster image](https://cdn.eso.org/images/thumb700x/eso0949g.jpg)
Details of the VISTA Fornax galaxy cluster image
![Mercury transit on May 7, 2003](https://cdn.eso.org/images/thumb700x/eso0312b.jpg)
Mercury transit on May 7, 2003
![The Orion Nebula and Trapezium cluster (detail)](https://cdn.eso.org/images/thumb700x/eso0104b.jpg)
The Orion Nebula and Trapezium cluster (detail)
![Globular cluster NGC1916 near N119 in the Large Magellanic Cloud](https://cdn.eso.org/images/thumb700x/eso9931f.jpg)
Globular cluster NGC1916 near N119 in the Large Magellanic Cloud
![Highlights of the Dark Wolf Nebula](https://cdn.eso.org/images/thumb700x/eso2416b.jpg)
Highlights of the Dark Wolf Nebula
![Group photo at the signing of the ELT M5 commissioning mirror agreement](https://cdn.eso.org/images/thumb700x/ann24011a.jpg)
Group photo at the signing of the ELT M5 commissioning mirror agreement
![Signing of the ELT M5 commissioning mirror agreement](https://cdn.eso.org/images/thumb300y/ann24011b.jpg)
Signing of the ELT M5 commissioning mirror agreement
![A view of the OASIS container on ESO’s Paranal Observatory](https://cdn.eso.org/images/thumb300y/ann24006a.jpg)
A view of the OASIS container on ESO’s Paranal Observatory
![An aerial view of the OASIS project container at ESO’s Paranal Observatory](https://cdn.eso.org/images/thumb300y/ann24006c.jpg)
An aerial view of the OASIS project container at ESO’s Paranal Observatory
![Equipment from the OASIS project at ESO’s Paranal Observatory](https://cdn.eso.org/images/thumb300y/ann24006b.jpg)
Equipment from the OASIS project at ESO’s Paranal Observatory
![ELT M1 segments take shape at Safran Reosc polishing facilities](https://cdn.eso.org/images/thumb300y/img-6499.jpg)
ELT M1 segments take shape at Safran Reosc polishing facilities
![ELT M1 segment assembly in final inspection](https://cdn.eso.org/images/thumb300y/img-9115.jpg)
ELT M1 segment assembly in final inspection
![The ELT M2 mirror in metrology](https://cdn.eso.org/images/thumb300y/img-7432.jpg)
The ELT M2 mirror in metrology
![ELT M1 segment blanks queuing in the Safran Reosc polishing facilities](https://cdn.eso.org/images/thumb700x/img-7856.jpg)
ELT M1 segment blanks queuing in the Safran Reosc polishing facilities
![Sunset at the ELT construction site](https://cdn.eso.org/images/thumb700x/huedepohl-elt-june2023.jpg)
Sunset at the ELT construction site
![The BlackGEM array at ESO’s La Silla Observatory](https://cdn.eso.org/images/thumb300y/eso2308g.jpg)
The BlackGEM array at ESO’s La Silla Observatory
![Close up of the BlackGEM array at ESO’s La Silla Observatory](https://cdn.eso.org/images/thumb300y/blackgem2.jpg)
Close up of the BlackGEM array at ESO’s La Silla Observatory