Science Announcements

Pitch your Research to ESO Communications to Reach a Broad Audience

Published: 05 Jun 2023

Are you an author on an upcoming scientific study based on ESO data that could be relevant to journalists or the wider public? Or are you a Principal Investigator on ESO observations with potential to become stunning images like that above? If so, please consider sending your paper and/or a preview of the image(s) obtained with ESO telescopes to ESO's Media Manager Barbara Ferreira at

Metal Production and Distribution in a Hierarchical Universe - II

Published: 05 Jun 2023

Metals trace the full evolution of the Universe: from primordial Helium and Lithium in the big-bang nucleosynthesis to all heavier elements produced in stars and explosive events. Their relative abundances in different environments, and across cosmic time, reveal the underlying star formation history and gas exchange processes. We can now use metal production and distribution to test our ideas of galaxy evolution at many different hierarchical scales: from stellar clusters to clusters of galaxies. The hierarchical build up of present-day structures at different redshifts can also be followed, which goes in parallel with the build-up of stellar and metal mass. These processes are interwoven: during most of cosmic history metal production happens at stellar scales, but metal distribution is effective on spatial scales covering several orders of magnitude. Therefore simulations require exceptional computational power, and tracing metals across cosmic time needs an equivalent investment in observational facilities. Ten years later the original meeting held at Paris Observatory, the time has come to gather the scientific community and discuss the impact of the recent advent of massive spectroscopic surveys (e.g., APOGEE, LAMOST, the Gaia ESO survey, Gaia, GALAH...), the Gaia astrometric mission and the now operative James Webb Space Telescope.

MOONS Detector Systems – All Science Grade Detector Systems are Shipped

Published: 15 May 2023

All six of the final Science Grade Detector systems have now been shipped to the UK Astronomy Technology Centre to be integrated into the MOONS instrument. The MOONS Detector System work package began in 2017 with the initial design phase and procurement. A total of eleven detectors have been tested in this time, this included 7 x Teledyne H4RG-15 detectors in the latest FRSBE package with 2.5 µm cut-off material (1 x Multiplexer, 1 x Engineering Grade, 5 x Science Grade detectors) as well as 4 x LBNL fully-depleted CCDs (2 x Engineering Grades and 2 x Science Grades). At the same time, 3 new test facilities had to be designed and developed, CRISLER for H4RG detector testing, CEAT for MOONS detector cryogenic cable testing and a new test cryostat for the CCDs.

The Messenger 190 is Now Available Online-only, Subscribe to Receive it into your Inbox

Published: 15 May 2023

As previously announced, after nearly half a century in publication, ESO’s journal for science and technology, The Messenger, is making a jump into the digital world by becoming an online-only publication. As reader habits have continued to shift online along with journal publication practices, and with sustainability an ever greater focus at ESO, The Messenger has evolved accordingly. Readers will now be able to find both new and old issues of the historic journal at a new redesigned webpage, making the published articles in The Messenger more accessible, usable and traceable than before. 

Scientific and Technical Committee Meeting

Published: 15 May 2023

Under its remit to “Advise Council and the Director General on policy matters of scientific and technical importance related to the planning and operation of ESO”, the STC had its 102nd meeting on 17 and 18 April in Vitacura, Chile. The agenda included the updates on current and future ESO facilities. As always the STC was deeply impressed by the high level of activity at all of ESO’s observatories -ALMA, ELT and Paranal/La Silla.

Call for Proposals for ESO Workshops 2024 - Extended Deadline

Published: 12 May 2023

Please note that the initial deadline to submit proposals for scientific workshops at ESO in 2024 has been extended until 17 May 2023, due to technical reasons.

VLT MAVIS Instrument Passes Preliminary Design Review

Published: 10 May 2023

MAVIS (MCAO-Assisted Visible Imager and Spectrograph) successfully passed its preliminary design review at the end of March. MAVIS is intended to be installed at the Nasmyth A focus of the VLT UT4 in 2030 (replacing Hawk-I/GRAAL), and is made of two main parts: an Adaptive Optics (AO) system that cancels the image blurring induced by atmospheric turbulence, and its post focal instrumentation, an imager and an IFU spectrograph, both covering the visible part of the light spectrum.

ALMA at 10 Years: Past, Present and Future

Published: 08 May 2023

The ALMA partnership is organizing a conference to commemorate its first decade of science operations. The conference will take a look back at the observatory accomplishments, highlight its latest results and look forward to future technical developments. It will take place from 4 to 8 December 2023 in Puerto Varas, Chile. Abstract submission and registration for the conference is now open at the conference webpage with a deadline for abstract submission on the 31st of May 2023. 

Fifth Release of UltraVISTA Public Survey Data

Published: 05 May 2023

UltraVISTA is an ultra-deep near-infrared survey of the central region of the COSMOS field. The fifth UltraVISTA data release comprises stacked images in YJHKs and NB118 narrow-band filters, as well as single-band and dual-mode source lists. The data release also contains a five-band merged catalogue, created from the individual Ks-selected source lists. The release is based on the observations carried out from December 2009 to mid 2019, corresponding to 81125 individual images. This is three years more than DR4. The additional data have almost homogenised the exposure time in the “deep” and “ultra-deep” stripes in the J, H and Ks filters, which now reach the same depths to ∼0.15 mag.

“Two in a Million” - The Interplay between Binaries and Star Clusters: Second Announcement

Published: 04 May 2023

The conference “Two in a million” - The interplay between binaries and star clusters will be held at ESO Garching, Germany, between 11-15 September 2023. Both in-person and online participation will be possible. Please note that the list of invited speakers has been updated.

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