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Special Issues

Bacteria publishes Special Issues to create collections of papers on specific topics, with the aim of building a community of authors and readers to discuss the latest research and develop new ideas and research directions. Special Issues are led by Guest Editors, who are experts on the topic and all Special Issue submissions follow MDPI's standard editorial process.

The journal’s Editor-in-Chief and/or designated Editorial Board Member will oversee Guest Editor appointments and Special Issue proposals, checking their content for relevance and ensuring the suitability of the material for the journal. The papers published in a Special Issue will be collected and displayed on a dedicated page of the journal’s website. Further information on MDPI's Special Issue polices and Guest Editor responsibilities can be found here. For any inquiries related to a Special Issue, please contact the Editorial Office.

Open for Submission

Magnetic Fields and Activity in Stars: Origins and Evolution

Guest Editor: Renada Konstantinova-Antova
2 articles | Viewed by 1,084

Deadline: 21 April 2026

Open for Submission

Ultra-High Energy Cosmic Rays: Past, Present and Future

Guest Editors: Dmitriy Kostunin, Vladimir Lenok
3 articles | Viewed by 2,146

Deadline: 20 April 2026

Open for Submission

Multi-wavelength Properties of Active Galactic Nuclei

Guest Editor: Stefano Vercellone
5 articles | Viewed by 3,353

Deadline: 31 March 2026

Open for Submission

Exploring the Heavy Ion Collisions in Particle Physics

Guest Editors: Marcello Abbrescia, Giuseppe Mandaglio
Viewed by 513

Deadline: 31 March 2026

Open for Submission

The 10th Anniversary of Universe: Standard Cosmological Models, and Modified Gravity and Cosmological Tensions

Guest Editors: Panayiotis Stavrinos, Antonino Del Popolo, Hermano Velten, Tina Kahniashvili, Jean-Michel Alimi, Yi-Fu Cai
10 articles | Viewed by 7,605

Deadline: 31 March 2026

Open for Submission

10th Anniversary of Universe: Studying the Strongly Interacting Matter in Nuclear Reactions from Intermediate to Ultra-Relativistic Energies

Guest Editors: Máté Csanád, Panos Christakoglou, Giuseppe Verde, You Zhou
Viewed by 453

Deadline: 31 March 2026

Open for Submission

10th Anniversary of Universe: Galaxies and Their Black Holes

Guest Editors: Paola Marziani, Mauro D’Onofrio
4 articles | Viewed by 3,560

Deadline: 31 March 2026

Open for Submission

The Lifecycle of Massive Stars

Guest Editor: Jacco Th. van Loon
Viewed by 320

Deadline: 31 March 2026

Open for Submission

Seyfert Galaxies: Probing the Active Nuclei of Nearby Galaxies

Guest Editor: Oli Luiz Dors
Viewed by 760

Deadline: 31 March 2026

Open for Submission

X-Ray Binaries: Accretion and Compact Objects

Guest Editors: Yanjun Xu, Cosimo Bambi, Andrea Santangelo, Fiamma Capitanio
Viewed by 108

Deadline: 31 March 2026

Open for Submission

Supermassive Black Hole Mass Measurements

Guest Editor: Benjamin Boizelle
2 articles | Viewed by 1,329

Deadline: 20 March 2026

Open for Submission

The First Stars: Keys to Understanding Dark Matter

Guest Editor: Øyvind Grøn
Viewed by 446

Deadline: 28 February 2026

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Universe - ISSN 2218-1997