Special Issues

Galaxies 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 policies and Guest Editor responsibilities can be found here. For any inquiries related to a Special Issue, please contact the Editorial Office.

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Neutron Capture Processes in the Universe
edited by , Luciano Piersanti and Diego Vescovi
submission deadline 15 Apr 2026 | 6 articles | Viewed by 4726 | Submission Open
Keywords: stellar nucleosynthesis; stellar evolution; multimessenger astronomy; neutron capture processes
Foundations of MHD Turbulence: Theories, Methods and Observations
edited by
submission deadline 15 Apr 2026 | Viewed by 560 | Submission Open
Keywords: MHD turbulence; plasma astrophysics; data analysis; heliosphere; interstellar medium
The Evolution of Gravitational Wave Detectors
edited by and Mattia Boldrini
submission deadline 31 May 2026 | Viewed by 545 | Submission Open
Keywords: gravitational waves; gravitational wave detectors; optics; laser interferometry; mechanics; control theory
From Cosmic Dawn to Hawking’s Glow: The Lifecycle and Legacy of Primordial Black Holes submission deadline 31 May 2026 | Viewed by 220 | Submission Open
Keywords: primordial black holes; Hawking radiation; collapse mechanism; gravitational waves
X-Ray Probes of Black Hole Spin and Accretion Physics
edited by Delilah Gates and Javier Garcia
submission deadline 1 Jun 2026 | Viewed by 399 | Submission Open
Keywords: black hole spin; X-ray spectroscopy; accretion disks
Gravitational-Wave Probes of Black Hole Spin and Binary Dynamics submission deadline 1 Jun 2026 | Viewed by 263 | Submission Open
Keywords: black hole spin; gravitational waves; compact binaries; black hole physics
Probing Black Hole Spins with Horizon-Scale Images
edited by
submission deadline 1 Jun 2026 | Viewed by 164 | Submission Open
Keywords: black hole spin; event horizon-scale imaging; relativistic jets; very long baseline interferometry; black hole physics
Multimessenger Transients in the X-Ray Light
edited by
submission deadline 10 Jun 2026 | Viewed by 184 | Submission Open
Keywords: X-ray; galactic sources; emission characteristics; variability; multi-wavelength counterparts; gravitational wave detection
Origins and Models of Planetary Nebulae, 2nd Edition
edited by and Xuan Fang
submission deadline 15 Jun 2026 | 2 articles | Viewed by 1728 | Submission Open
Keywords: planetary nebulae; nebulae around massive stars; nova remnants; symbiotic stars; shaping mechanisms; binary stars
Unveiling the Structural Properties of Galaxies Using Contemporary Wide-Field Surveys
edited by Aleksandr Mosenkov
submission deadline 15 Jul 2026 | Viewed by 190 | Submission Open
Keywords: galaxies: structure; galaxies: evolution; galaxies: photometry; galaxies: halos; galaxies: interactions; surveys; methods: observational
Blazar Variability Across All Timescales
edited by James R. Webb and
submission deadline 30 Jul 2026 | 1 articles | Viewed by 772 | Submission Open
Keywords: blazars; blazar variability; multiwavelength variability of blazars; blazar jets; blazar line variability
Study on Contact Binary Stars
edited by Kai Li and Atila Poro
submission deadline 14 Aug 2026 | 2 articles | Viewed by 3376 | Submission Open
Keywords: contact binary; O’ Connell effect; shortperiod cutoff; minimum mass ratio; orbital period change; light curve analysis; radial velocity curve
Strong Gravitational Lens Modeling
edited by Stefan Schuldt
submission deadline 15 Sep 2026 | 1 articles | Viewed by 885 | Submission Open
Keywords: strong lens mass modeling (full wavelength range); galaxy-scale; group-scale; cluster-scale; automated modeling; high-precision modeling; machine learning; lens confirmation; mass-sheet degeneracy; dark matter; cosmology
Undifferentiated Asteroids and Meteorites as Rosetta Stones to Study Protoplanetary Disks and Planetary Formation
edited by , Lysa J. Chizmadia, and Danai Polychroni
submission deadline 15 Sep 2026 | Viewed by 184 | Submission Open
Keywords: chondrites; chondrules; protoplanetary disks; astrochemistry; cosmochemistry; planet formation; planetary impacts
Theoretical and Observational Approaches to the Hubble Tension in Cosmology
edited by and Harry Desmond
submission deadline 30 Sep 2026 | 4 articles | Viewed by 5248 | Submission Open
Keywords: cosmology; distance scale; supernovae; galaxies; variable stars; stellar populations; recombination
Astrophysical Magnetohydrodynamics, Plasma Physics and Cosmic Rays
edited by and Ka Wai Ho
submission deadline 15 Oct 2026 | Viewed by 298 | Submission Open
Keywords: astrophysics; MHD turbulence; magnetism; plasama; cosmic ray; numerical simulations; multi-phase media; magnetic reconnection
Bridging Stellar Populations and Dynamics to Reconstruct Galaxy Assembly Histories
edited by Jesús Falcón-Barroso and Ling Zhu
submission deadline 31 Dec 2026 | Viewed by 49 | Submission Open
Keywords: galaxy formation and evolution; galaxy dynamics; stellar populations in galaxies
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