Ronaldo Levenhagen from UNIFESP was invited to present a talk with title "Stellar astrophysics: Where the Earth ends and the universe begins" at the CFO Physics center. The seminar was held online on 5 November 2025 and was attended by ~20 Angolan students.

Julieta Sánchez Arias from ASU was invited to present a seminar talk with title "Testing Intrinsic Mode Functions for Analyzing Red Noise" at the Astronomical Institute, Charles University, Prague. The seminar was held on 29 October 2025 in the lecture hall of the University and was attended by ~40 professors, teachers and students.

On Sunday, October 19th, Ignacio Araya from Universidad Mayor, Santiago, Chile, and his colleagues participated in a science fair held at the Planetarium in Huechuraba, Santiago. The event was called "Primera Feria Científica, Planetario Huechuraba." During the activity, he distributed flyers about the OCEANS project and gave an outreach talk on stellar winds titled "Soplos cósmicos: Explorando los vientos de las estrellas masivas."

In the week 13-17 October, the Annual Meeting "Sociedad Chilena de Astronomía: SOCHIAS" was held at Universidad Austral de Chile in Puerto Montt, Chile. It was attended by several OCEANS members from UV and UMAYOR, who contributed with oral presentations on their most recent research results. These were:

• "New Theoretical Descriptions for Mass-Loss Rates of O-Type Stars" by Felipe Figueroa-Tapia (PhD student at Universidad de Valparaíso)

• "Predicting Parameters from Massive Stars Using Bayesian Neural Networks and Quantitative Spectroscopy" by Felipe Ortiz (PhD student at Universidad de Valparaíso)

• "ISOSCELES Project II: Modelling B-type stars for fast and δ−slow wind regimes" by Natalia Machuca (PhD student at Universidad de Valparaíso)

• "Hydrodynamics disks solutions of Be stars" by Catalina Arcos (Professor at Universidad de Valparaíso)

• "Derivation of stellar parameters for massives stars using machine learning" by Sara Cuéllar (Postdoc at Universidad Mayor)

The conference was attended by 267 participants.

In the seminar series of the Physics Department of the Federal Institute of Rio de Janeiro, in the city of Nilópolis, Marcelo Borges Fernandes from ON presented a remote talk on October 8th, 2025, with title "Massive Stars: Importance and Mysteries".

The talk, in portuguese, is available on Youtube.

As part of the annual celebration of World Space Week, the Universidad Autónoma de Nuevo León (UANL) hosted the Fifth Astronomy Week, organized by the student astronomy society Lanikea. From 6 to 10 October, activities at the Faculty of Physics and Mathematics (UANL) included solar observations, an astrophotography exhibition, and a series of popular science lectures delivered by leading experts from various fields of astrophysics. Carlos Guerrero (UANL) and Olga Maryeva (ASU) also gave invited talks for students.

Carlos discussed speckle interferometry and diffraction-limited observations for studying stellar multiplicity, while Olga presented the ambitious scientific goals of the OCEANS project. All lecture attendees received OCEANS informational flyers.

On 26 September 2025 the traditional Researchers Night took place. At the Ondřejov Observatory, a diversity of activities took place, starting from 15:00 until midnight. The many facilities for observations of the sun, stars, asteroids and high-energy physics objects were presented along with popular science talks. In addition, the Stellar Department offered activities for kids.

Besides, OCEANS members from ASU as well as from UNLP and UNC-OAC that were on secondment at ASU, were actively involved in this outreach activity and presented the OCEANS project to the interested public.

Despite the poor weather, about 250 people at all ages from the general public visited Ondřejov Observatory.

Two students from UNIFESP, Pâmela Alves de Oliveira and Aline Bento Teixeira, participated at the "II SUPG - Simpósio Unificado da Pós-Graduação (II Unified Postgraduate Symposium)" that took place on 26 September 2025 at the Campus Diadema of Universidade Federal de São Paulo and presented their results in oral presentations: "Desvendando as Condições Físicas das Atmosferas de Estrelas B Normais (Unraveling the Physical Conditions of Normal B-Star Atmospheres)" by Pâmela Alves de Oliveira and "Classificação de Estrelas Early-Type no Survey Lamost (Early-Type Star Classification in the Lamost Survey)" by Aline Bento Teixeira. This symposium has been attended by about 30 persons, consisting of researchers involved with post-graduation programmes and their masters degree and doctorate alumni.

On September 22nd-24th 2025, Yeisson Osorio and Alba Casasbuenas from the Instituto de Astrofísica de Canarias (IAC), Spain attended the 2nd International School on Atomic and Molecular Data Evaluation and Curation at the Universidad de Valladolid. There, they presented the posters “maKe Atoms Simple: a tool to create, manipulate and combine model atoms.” and “Improving the reliability of chemical abundance determinations of B stars using high-resolution  spectroscopy”, respectively.

On September 17th-19th 2025, Alba Casasbuenas from the Instituto de Astrofísica de Canarias (IAC), Spain, attended the 30th Anniversary congress of the Amateur Astronomy Association of the Universidad Complutense de Madrid. There, she presented the oral communication: “Deciphering the Physics of Massive Stars from the Canary Islands Observatories”, where she shared her thesis research and the Oceans project with the current students of the Physics faculty.

On Sept. 15-19, 2025, members from the OCEANS Consortium participated in the No. 402 International Astronomical Union (IAU) Symposium "Massive Stars Across Redshifts in the Era of JWST and Large-Scale Surveys", which took place in Ensenada, Mexico. The subjects of discussion included an update on the ongoing large-scale spectroscopic surveys, the progress made on stellar evolution theory, population synthesis and atmosphere modeling, analysis techniques for assessing stellar interior and surroundings such as asteroseismology, spectropolarimetry, and interferometry, and, studies on individual objects with high interest. Highlighted were the next-generation observational facilities and instruments, prospecting to address key open questions on massive stars. The OCEANS members were among the about 125 attendants, participating with invited and contributed talks, posters, as well as with involvement in the scientific organization of the meeting.

• "How large spectroscopic surveys are shaping our understanding of massive stars", invited talk
  by Sergio Simón-Díaz (Instituto de Astrofísica de Canarias, Spain, IAC)

• "Massive stars seen through interfermetric eyes", contributed talk
  by Marcelo Borges Fernandes (Observatório Nacional, Brazil, ON)

• "Newly discovered nebulae and their origin around Galactic B-type stars", poster
  by Olga Maryeva (Astronomical Institute, Czech Republic, ASU)

• "TESS variability of B-type supergiants in the Galaxy", poster
  by Michalis Kourniotis (Astronomical Institute, Czech Republic, ASU)

From September 15–19, OCEANS was present in Mendoza, Argentina, at the 67th Annual Meeting of the Argentinian Astronomical Association (RAAA67), a meeting that brought together more than 270 participants — including MSc and PhD students, postdocs, and professional astronomers from all over the country.

With over 200 contributions split into talks and posters, OCEANS members took part with 4 oral presentations and 15 posters. One of these posters ("El OCEANS project: Overcoming Challenges in the Evolution and Nature of Massive Stars", prepared by Leticia V. Ferrero, Roberto O. J. Venero, Martina I. Tapia-Reina, Michaela Kraus, Lydia S. Cidale, Anahí Granada, J. F. González, & Mercedes N. Gómez) was dedicated exclusively to introducing the OCEANS project (in Spanish language), its objectives, and the participating institutions, accompanied by explanatory flyers that were shared with attendees.

In addition, OCEANS members attending the meeting took the opportunity to capture a group photo, highlighting the collaborative spirit of our network.

It was a truly fruitful and inspiring meeting, full of opportunities to share science, strengthen collaborations, and promote the OCEANS project within the Argentinian astronomical community.

Oral presentations:

• "Ages of stellar clusters in the Large Magellanic Cloud using Gemini/GMOS integrated spectroscopy: Systematic comparison of available tools"
  by Martina Tapia-Reina (Universidad de Córdoba, UNC-OAC)

• "Diffuse X-Ray emission in Westerlund 1: Investigating the hot environment of a Massive Stellar Starburst"
  by Juan Facundo Albacete Colombo (Universidad de Río Negro, UNRN)

• "Spectral line modelling: A hydrodynamic exploration in supergiant B stars "
  by Melina Fernández (Universidad Nacional de La Plata, UNLP)
  

• "Eclipses in sight in the massive triple system Herschel 36 A"
  by Jonathan Moreno (Universidad Nacional de La Plata, UNLP)

Poster contributions (with names of presenters in bold):

• "Spectral characterisation of NGC 6316 and M15: Application of spectral synthesis on their integrated spectra"
  by Alejandra Martinez-Bezoky, Andrea V. Ahumada (Universidad de Córdoba, UNC-OAC) & Luis R. Vega Neme

• "Evaluation of new models of simple stellar populations using integrated spectra of stellar clusters"
  by Tomás Krilich, Martina Tapia-Reina (Universidad de Córdoba, UNC-OAC), Ailen Callen, Andrea Ahumada & Randa Asa'd

• "Characterisation of the Wolf-Rayet population in Danks 1 using integrated spectroscopy"
  by Tomás Krilich, Andrea V. Ahumada (Universidad de Córdoba, UNC-OAC) & Walter A. Weidmann

• "Spectrophotometric study of open clusters"
  by Ana Laura García, Andrea V. Ahumada (Universidad de Córdoba, UNC-OAC) & Federico Oscar Simondi-Romero

• "Determination of the age and metallicity of Pismis 16 from GAIA data"
  by Federico O. Simondi-Romero (Universidad de Córdoba, UNC-OAC), & Iván Bustos Fierro

• "Inclination in Be stars from Hα profiles: entropy and complexity"
  by Anahí Granada (Universidad de Río Negro, UNRN), A.R. Plastino, & Y.R. Cochetti.

• "Spectral and physical characterization of B-type stars in Trumpler 11"
  by A. Kalsi, L. Cidale (Universidad Nacional de La Plata, UNLP), Y. Aidelman, C. Escudero, A. Granada, & A.P. Milone

• "Photometric properties of Bn variable stars"
  by L. Areas Zavala & L. Cidale (Universidad Nacional de La Plata, UNLP)

• "Multiwavelength study of the B[e] supergiant LHA 115-S 6"
  by Andrea F. Torres (Universidad Nacional de La Plata, UNLP), M.L. Arias, M. Kraus, L.S. Cidale, P.E. Marchiano, L.V. Mercanti & A. Alberici Adam

• "New insights into the circumstellar environment of the SMC B[e] supergiant LHA 115-S 18"
  by M.L. Arias (Universidad Nacional de La Plata, UNLP), Andrea F. Torres, Michaela Kraus & Lydia S. Cidale

• "Modeling Dust Absorption in Circumstellar Envelopes of Hot Stars"
  by Paula E. Marchiano (Universidad Nacional de La Plata, UNLP), Lydia Cidale, Michaela Kraus, Andrea F. Torres & M. L. Arias

• "Fundamental stellar parameters of the components of the massive binary system HD 93130"
  by Mijail Milicich, Roberto Gamen (Universidad Nacional de La Plata, UNLP) & Tomás Ansín

• "Mass-loss rates of O stars: a bayesian approach"
  by Jorge A. Panei (Universidad Nacional de La Plata, UNLP), F. Figueroa-Tapia, M. Curé, S. Ekström, G. Puš-Perchaud, I Araya, L.S. Cidale, R.O.J. Venero & A.C. Gormaz-Matamala

• "New binary system with Wolf-Rayet component"
  by Ana E. Collado (Universidad de San Juan, ICATE), Roberto C. Gamen, & Rodolfo H. Barbá

• "Modelling B-type stars within ISOSCELES grid"
  by Natalia Pamela Machuca Arroyo (Universidad de Valparaíso, UV), Michel Curé, Ignacio Araya, Roberto O. J. Venero, Lydia S. Cidale, Catalina Arcos, Sergio Simón-Díaz & A. Lobel
  
  

Two researchers, Federico García and Jorge Ariel Combi from UNLP, participated at the eleventh micro-quasar workshop A Microquasar Odyssey: Unveiling the Complexities, held in the period 15-19 September 2025 at Cefalú, Sicily, Italy. Two posters were presented: "NICER and NuSTAR observations of the ultraluminous source NGC 4190 ULX-1" by Jorge Ariel Combi and "Narrow coherence drops in XRBs: evidence for additive QPOs?" by Federico García.

The international workshop was attended by 130 scientists.

Marcelo Borges Fernandes from ON participated at the XXIX Encontro Sergipano de Física (XXIX Sergipe Physics Meeting), which took place at the Federal University of Sergipe in the city of Aracaju in the northeast of Brazil, from August 6th to 8th, 2025. He presented a talk with title "Massive Stars: Importance and Mysteries". It took place on August 8th for an audience composed of researchers, undergraduate, Master's and PhD. students and postdocs.

Three Researchers from ASU participated at the 9th TESS/16th Kepler Asteroseismic Science Consortium Workshop, held in the period 7-11 July 2025 at the Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria. The workshop offered a variety of subjects including OB stars, Binaries and Mergers, Convection & Activity, and informed about ongoing and upcoming missions (TESS, PLATO, Roman). In addition, it offerend mentoring sessions for young astronomers and poster sessions. In the latter, three posters were presented: "TESS Variability of B-type Supergiants in the Galaxy" by Michalis Kourniotis; "Testing Intrinsic Mode Functions for Analysing Red Noise" by Julieta Sánchez, and "Analysis of Stellar Variability in the B-Supergiant HD 14134: Insights from Spectroscopy and Photometry" by Suryani Guha.

Over 200 scientists working in different pulsating stars across the HR diagram participated in this workshop, which made it a unique environment to present the latest results of the Oceans project in this field, hold rich scientific discussions, and expand collaboration networks.

On Thursday, 27 June 2025, the Minister of Transport of the Czech Republic - Martin Kupka, the Director of the Department of Space Activities - Václav Kobera, and the President of the Academy of Sciences of the Czech Republic - Radomír Pánek, visited the Astronomical Institute (ASU) in Ondřejov.

On their tour through the institute and its facilities, they also visited the Perek-2m telescope where they were introduced to the different instruments and learned about the scientific observing and research programs that are implemented at the Stellar Department. Furthermore, they discussed with representatives of the ASU its participation in the implementation of current and new space missions under the leadership of the European Space Agency (ESA). Finally, they were introduced to the OCEANS project and its goals, emphasizing the importance of continuously promoting basic research.

Leticia V. Ferrero from OAC-UNC participated in the workshop The role of accretion and ejection variability in the evolution of young stars and their disks, held from 19 to 22 May at the ESO Headquarters in Garching, Germany. During the event, Leticia presented a poster with title “Infrared Jets and Submillimeter Observations: Unveiling the Nature of HH 138 and HH 137”

All the talks were highly interesting and enriching, offering valuable insights into the variability phenomena associated with accretion and ejection in young stellar objects. The workshop provided an excellent opportunity to interact with colleagues, share her work, and receive useful feedback and suggestions for future developments. About 100 researchers attended the workshop.

Marcelo Borges Fernandes from Observatório Nacional (ON) communicated the OCEANS project to PhD students and postdocs during the XII SimFAST meeting (Simpósio de Física e Astronomia da Universidade do Vale do Paraíba - Physics and Astronomy Symposium of the University of Vale do Paraíba) that took place in the period 28 - 30 May 2025. Marcelo presented an online talk with title "The Mysteries of Massive Stars".

OCEANS team members from ASU participated in the organization and implementation of the outreach activity Open Days that took place Friday, 16 and Saturday, 17 May 2025 on the gounds of the Ondřejov Observatory with a manifold program for children and adults.

The main activities, in which OCEANS members were involved, took place at and around the Perek 2-m telescope, which is an important telescope used by ASU members for their scientific activities in the frame of OCEANS. With this telescope, optical spectroscopic data of massive stars and binaries are collected and analyzed. The OCEANS project was presented on a poster (in czech language).

Moreover, we had prepared flyers in both czech and english language that we distributed to interested visitors, while kids had good times with painting and building rockets, posing as an astronaut, and having their face decorated with space ships, rockets, planets, and aliens.

In addition, numerous films on various astronomical topics were presented and visitors had the opportunity to view the telescope up close. Our team members were available to answer any questions.

Around 2,000 visitors took advantage of this opportunity and attended this public event. We are already looking forward to the next public event, where we hope to reach and inspire even more people interested in our science and astronomical topics in general.

The posters and flyers can be accessed through our Information page.

Five Researchers from ASU participated at the DPG Spring Meeting of the Matter and Cosmos Section (SMuK) that took place in the period 31 March - 4 April 2025 at the University of Göttingen, Germany. In the frame of this conference, the Extraterrestrial Physics Division organized splinter meetings on solar and heliospheric physics, near-Earth space, planets and small bodies, exoplanets and astrobiology, and astrophysics.

Within the latter, that was organized and chaired by Michaela Kraus, they presented 3 contributed talks (Olga Maryeva - "Newly discovered nebulae around Galactic B-type stars and their origins", Dieter Nickeler - "On the existence and (non-)uniqueness of null points of flows and magnetic fields as prerequisites for the existence of astropauses", Kuljeet Singh Saddal - "3D Resistive MHD Perspectives on the Localized Dynamics at the Apex of an Astropause") and 4 posters (Michaela Kraus - "OCEANS - Overcoming challenges in the evolution and nature of massive stars", "Near-infrared characterization of evolved massive stars in M31 and M33", Olga Maryeva - "Revealing the pulsation-induced mass loss of blue supergiants and its interplay with the interstellar medium", Julieta Sánchez Arias - "Stochastic high frequencies in massive stars").

This conference was attended by about 1,700 researchers from various fields, which offered the opportunity to present OCEANS, recent progress and research results, and to discuss with astrophysicists and physicists from different disciplines.