Science Announcements

Call for Proposals for Period 118

Published: 15 Jul 2026

The Call for Proposals for observations at ESO telescopes in Period 118 (1 May 2027 - 30 April 2028) has been released. Please consult the Period 118 document before applying for time on ESO telescopes. All technical information about the offered instruments and facilities can be found on the ESO webpages linked from the Call for Proposals. The proposal submission deadline is on 22 September 2026, 12:00 CEST.

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ESO’s first Fast Track Channel Call 117A Proposal Submission Statistics

Published: 15 Jul 2026
ESO received 244 valid proposals for its first Fast Track Channel (FTC) call 117A (1 September 2026 – 28 February 2027). The deadline for proposal submission was 15 June 2026. The total time request amounted to approximately 1970 hours (of which 80 hours were Target-of-Opportunity requests), for a total available time of 460 hours for this first FTC call. This corresponds to a mean oversubscription factor of 4.3, comparable to that of the previous Yearly Cycle (P117). The telescope with the highest oversubscription is Melipal (UT3), with a total request of 643 hours (excluding ESPRESSO), corresponding to an oversubscription factor of 7.1 (again excluding ESPRESSO). The most demanded instrument was X-Shooter (406 hours), followed by ESPRESSO (307 hours, to be distributed among several UTs; labelled as ICCF1 in the above graph), and MUSE (236 hours). As a reminder, only VLT/I Normal programmes with a maximum time request of 30 hours were offered in this first FTC call.
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ALMA Reaches 5000 Refereed Publications

Published: 13 Jul 2026

On 27th June 2026, ALMA and its scientific community reached a major scientific milestone with the publication of the 5000th refereed paper based on ALMA data. This achievement comes just 14 years after the start of Early Science operations and reflects ALMA’s extraordinary scientific impact. All of these ALMA publications and data are accessible through the ALMA Science Archive at almascience.org/aq.

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Celebrating ALMA Band 2 Production Completion

Published: 06 Jul 2026
On 16 June 2026, ESO's ALMA Support Centre hosted the ALMA Band 2 Production Completion Event. Thirty-six participants from the Band 2 consortium, contributing European institutes, industry partners, and the National Astronomical Observatory of Japan (NAOJ) travelled to ESO Garching to celebrate this important milestone for ALMA. Together with ESO staff, more than 70 people attended the associated workshop and celebration activities throughout the day.
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ALMA at 15 years: Science, Synergies, and the Road Ahead

Published: 06 Jul 2026
ESO is pleased to announce that the international conference "ALMA at 15 Years: Science, Synergies, and the Road Ahead" will be held in person from Feb. 22–26, 2027, at Academia Sinica's Nangang campus in Taipei, Taiwan. The conference will highlight ALMA's latest results, especially since the last Pan-ALMA conference held in 2023 and identify exciting directions for future ALMA research. Abstract submission is now open.
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First Public Release of the ELT Guide Star Catalogue Version 1.0 (ELT-GSC1.0)

Published: 01 Jul 2026
The ELT-GSC1.0 is the first public release of the all-sky reference catalogue that will support guiding and adaptive-optics (AO) operations of ESO's Extremely Large Telescope (ELT) and its first-generation instruments, including MICADO and the MORFEO multi-conjugate AO module. It is built directly on the JWST Guide Star Catalogue version 3.1 (GSC3.1), kindly made fully available to ESO by the Space Telescope Science Institute (STScI).
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Release of Deep MUSE Mosaic of NGC 1427A in the Fornax Cluster

Published: 26 Jun 2026
This new data release provides a deep VLT/MUSE integral-field spectroscopic mosaic of the dwarf irregular galaxy NGC 1427A in the Fornax Cluster. The release consists of a reduced and calibrated MUSE data cube covering the wavelength range 470–935 nm together with an associated white-light image. The dataset combines 67 observations obtained between 2015 and 2023 under ESO programmes 094.B-0612(A), 110.23VM.001, and 111.24R5.001, for a total exposure time of 44.7 ks.

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Issue 196 of The Messenger is Available Online

Published: 25 Jun 2026
The latest Edition of ESO's Science and Technology Journal, The Messenger, is now available online. In this issue 196 readers will find articles highlighting the latest scientific discoveries, technological developments, and community activities across ESO and its Member and Partner States. From advances in astronomical instrumentation and surveys to reports from workshops and collaborative initiatives, The Messenger continues to showcase the breadth and impact of ESO’s facilities on astronomy.
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Public Release of VLT/MUSE Integral Field Spectroscopy

Published: 15 Jun 2026

This is the public release of VLT/MUSE integral field spectroscopy observations of a 3'x8' mosaic along the southern major axis of the Local Group spiral galaxy M33, obtained under ESO Programme 109.22XS.001 (PI: G. Cresci). The observations were carried out in seeing-limited wide-field mode (WFM), covering the nominal wavelength range 4750 and 9350 Å .

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Record Number of Proposals Submitted for ALMA Cycle 13

Published: 07 May 2026

ALMA is pleased to report on the extraordinary response to the Cycle 13 Call for Proposals, which closed on 23 April 2026. Cycle 13 received a total of 1,843 proposals, accounting for more than 37,000 hours requested time on the 12-m Array. These numbers set a new record, underscoring the high level of competition for ALMA.

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