Universe

Cosmological Perturbations: From the Early Universe to Late-Time Evolution

edited by Giovanni Otálora

submission deadline 31 Aug 2025 | Viewed by 158 | Submission Open

Keywords: cosmological perturbations; quantum fluctuations; primordial gravitational waves; primordial black holes; inflationary models; modified gravity; large-scale structure; stochastic gravitational wave background; non-Gaussianity; dark energy perturbations

(This special issue belongs to the Section Cosmology)

Supermassive Black Hole Mass Measurements

edited by Benjamin Boizelle

submission deadline 21 Sep 2025 | Viewed by 225 | Submission Open

Keywords: supermassive black holes; active galactic nuclei; stellar or gaseous kinematics; dynamical modeling

(This special issue belongs to the Section Compact Objects)

Bouncing Cosmology and the Early Universe: From Theory to Observations

edited by Arnab Dasgupta

submission deadline 30 Sep 2025 | 1 articles | Viewed by 1212 | Submission Open

Keywords: bouncing cosmology; cyclic universe; cosmic microwave background (CMB); matter– antimatter asymmetry; dark energy and dark matter

(This special issue belongs to the Section Cosmology)

Geometric Theories of Gravity

edited by

László Árpád Gergely

submission deadline 30 Sep 2025 | 1 articles | Viewed by 656 | Submission Open

Keywords: spacetime; general relativity and its geometric reformulations; modified gravity: formal aspects and applications; perturbations and gravitational waves; cosmology; dark matter; and dark energy models

(This special issue belongs to the Section Gravitation)

Extensions of General Relativity and Applications to Cosmology and Gravitation

edited by Mauricio Bellini, Mariano Anabitarte and

Herbert W. Hamber

submission deadline 30 Sep 2025 | 1 articles | Viewed by 414 | Submission Open

Keywords: extended general relativity; gravitation; cosmology; early universe; topological defects; black holes; Hawking radiation; cosmic strings; quantum gravity; extended manifolds; Weyl manifolds; dark energy; dark matter

(This special issue belongs to the Section Gravitation)

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

edited by

Panayiotis Stavrinos

,

Antonino Del Popolo

,

Hermano Velten

, Tina Kahniashvili,

Jean-Michel Alimi

and

Yi-Fu Cai

submission deadline 31 Oct 2025 | 7 articles | Viewed by 4310 | Submission Open

Keywords: general relativity and its extensions; modified gravity; Λ CDM cosmological model; dark matter; dark energy; hubble tension; gravitational waves; scalar-tensor theories; cosmological anisotropies

(This special issue belongs to the Section Cosmology)

10th Anniversary of Universe: Galaxies and Their Black Holes

edited by

Paola Marziani

and

Mauro D’Onofrio

submission deadline 31 Oct 2025 | 2 articles | Viewed by 2067 | Submission Open

Keywords: supermassive black holes; accretion; galactic evolution; feedback; multimessenger astronomy; high-redshift universe; stellar- and intermediate-mass black holes

Search for New Physics Through Combined Approaches

edited by Yang Zhang and

Fei Wang

submission deadline 31 Oct 2025 | 2 articles | Viewed by 1552 | Submission Open

Keywords: beyond standard model physics; grand unified theory; collider physics; Higgs physics; electroweak precision measurements; dark matter; electroweak phase transition; gravitational wave

(This special issue belongs to the Section High Energy Nuclear and Particle Physics)

Advances in Nuclear Astrophysics

edited by Ragandeep Singh Sidhu, Gavin Lotay and Jaspreet Singh Randhawa

submission deadline 31 Oct 2025 | 2 articles | Viewed by 1266 | Submission Open

Keywords: nuclear astrophysics; observational astronomy; nuclear physics; stellar evolution; experimental techniques; fundamental properties

(This special issue belongs to the Section High Energy Nuclear and Particle Physics)

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

edited by

Dmitriy Kostunin

and Vladimir Lenok

submission deadline 31 Oct 2025 | 2 articles | Viewed by 1037 | Submission Open

Keywords: ultra-high energy cosmic rays; astrophysical neutrino; high-energy gamma rays; multimessenger astronomy; cosmic accelerators

(This special issue belongs to the Section Space Science)

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

edited by

Máté Csanád

, Panos Christakoglou,

Giuseppe Verde

and You Zhou

submission deadline 31 Oct 2025 | Viewed by 305 | Submission Open

Keywords: quark-gluon plasma; nuclear interactions; heavy-ion physics; strong interaction; phase diagram

(This special issue belongs to the Section High Energy Nuclear and Particle Physics)

New Progress of Black Hole Accretion Disk

edited by Arghajit Jana

submission deadline 31 Oct 2025 | Viewed by 192 | Submission Open

Keywords: active galactic nuclei; black holes; X-ray binaries; X-ray polarization; reverberation technique; accretion; accretion disk; jet; disk– jet couplings; quasars; Seyfert; blazars

(This special issue belongs to the Section Gravitation)

Quantum Field Theory in Curved Spacetime and Its Implications for Cosmology, Blackholes and Quantum Gravity, 2nd Edition

edited by Korumilli Sravan Kumar and

Joao Marto

submission deadline 14 Nov 2025 | Viewed by 200 | Submission Open

Keywords: quantum field theory in curved spacetime; quantum gravity; black holes; cosmology

(This special issue belongs to the Section Foundations of Quantum Mechanics and Quantum Gravity)

Magnetic Fields and Activity in Stars: Origins and Evolution

edited by

Renada Konstantinova-Antova

submission deadline 21 Nov 2025 | Viewed by 157 | Submission Open

Keywords: magnetic fields; magnetic activity; stellar evolution; dynamos in stars; star– planet interaction; spectropolarimetry; asteroseismology; stellar atmospheres

(This special issue belongs to the Section Solar and Stellar Physics)

Studying Astrophysics with High-Energy Cosmic Particles

edited by Kinwah Wu and

Ellis R. Owen

submission deadline 30 Nov 2025 | 4 articles | Viewed by 5589 | Submission Open

(This special issue belongs to the Section Cosmology)

Exploring Double Beta Decay: Probing Fundamental Properties of Neutrinos and Beyond

edited by

Rita Bernabei

submission deadline 30 Nov 2025 | 4 articles | Viewed by 2548 | Submission Open

Keywords: experimental and theoretical topics on double beta decay modes; low-background detectors and methodologies; nuclear matrix

(This special issue belongs to the Section High Energy Nuclear and Particle Physics)

Modified Gravity and Dark Energy Theories

edited by Changjun Gao

submission deadline 30 Nov 2025 | 2 articles | Viewed by 1638 | Submission Open

Keywords: dark energy; modified gravity theories; black hole solutions; exact solutions; black hole thermodynamics; nature of spacetime; black hole physics; gravitational waves in modified gravity theories

(This special issue belongs to the Section Gravitation)

Studies of Hadron Spectroscopy at the Current/Future Electron-Hadron and Electron-Ion Colliders

edited by Vladimir Khachatryan and Wenliang Li

submission deadline 30 Nov 2025 | Viewed by 406 | Submission Open

Keywords: quantum chromodynamics; electron scattering; electron-hadron colliders; hadron spectroscopy; conventional & non-conventional hadronic states; photo & electroproduction processes; exclusive & inclusive processes; fragmentation & hadronization

(This special issue belongs to the Section High Energy Nuclear and Particle Physics)

Insights into the Magellanic Clouds: From Star Formation to Galactic Dynamics

edited by Noelia E. D. Noël

submission deadline 1 Dec 2025 | Viewed by 87 | Submission Open

Keywords: Magellanic Clouds; dwarf galaxies; galaxy evolution; stellar populations; star formation history; chemical enrichment; galaxy interactions; dark matter; gas dynamics; cosmological simulations

(This special issue belongs to the Section Galaxies and Clusters)

Mechanisms Behind Black Holes and Relativistic Jets

edited by

Ioana Dutan

submission deadline 15 Dec 2025 | Viewed by 131 | Submission Open

Keywords: black holes; relativistic jets; active galactic nuclei; gamma-ray bursts; numerical simulations

(This special issue belongs to the Section Compact Objects)

BGL2025: The 13th Bolyai–Gauss–Lobachevsky Conference on Non-Euclidean Geometry and Its Applications

edited by Taoufik Ouali,

Tiberiu Harko

, László Jenkovszky, Ahmed Errahmani and

Amine Bouali

submission deadline 30 Dec 2025 | Viewed by 319 | Submission Open

Keywords: advances in mathematics; recent developments in physics; mathematics– physics dialogue; modified gravity theories; the Hubble tension; quantum gravity; cosmology; gravitational waves; complex systems; chaos and instability

Measurements, Observations and Theoretical Studies on the Solar Magnetic Field—Celebrating the 40th Anniversary of the Huairou Solar Observing Station

edited by

Shangbin Yang

, Mei Zhang,

Junfeng Hou

, Jiaben Lin and

Yu Liu

submission deadline 31 Dec 2025 | 17 articles | Viewed by 11185 | Submission Open

Keywords: solar magnetic field; solar polarimetry; multi-wavelength diagnostic; topology analysis; astroinformatics; MHD; solar dynamo; space weather forecasting; solar historical data; space projects

(This special issue belongs to the Section Solar and Stellar Physics)

Current Status of the Hubble Tension

edited by

Giovanni Montani

,

Eleonora Di Valentino

and Nakia Carlevaro

submission deadline 31 Dec 2025 | 4 articles | Viewed by 6005 | Submission Open

Keywords: Hubble tension; dark matter; dark energy; dark matter/dark energy interaction; quintessence; late universe physics; cosmology from modified gravity; early universe dark energy; model testing; data analysis

(This special issue belongs to the Section Cosmology)

Universe: Feature Papers 2025—Space Science

edited by

Ezio Caroli

submission deadline 31 Dec 2025 | 8 articles | Viewed by 4679 | Submission Open

Keywords: space mission/instrument/telescope concepts; inflight/in preparation space instrument; instrument performance evaluation; detectors technologies and perspectives; imaging and timing techniques and methods; spectroscopy and polarimetry techniques and methods; observational and analysis techniques and methods; cosmic ray sources emission models; methods for observing gravitational waves and counterparts at other frequencies (from radio to gamma); methods and techniques for planetary (solar and extrasolar) science and exploration; space technology and biomedicine; environmental science; telecommunications; materials science

(This special issue belongs to the Section Space Science)

Exploring Low-Frequency Gravitational Wave Sources: Waveforms, Detection and Sciences

edited by Wenbiao Han, Ziren Luo and Shucheng Yang

submission deadline 31 Dec 2025 | 5 articles | Viewed by 4414 | Submission Open

Keywords: gravitational waves; black holes; tests of theories of gravity; machine learning; data analysis

(This special issue belongs to the Section Gravitation)

Advances in Studies of Galaxies at High Redshift

edited by Krisztina Éva Gabányi

submission deadline 31 Dec 2025 | 3 articles | Viewed by 3738 | Submission Open

Keywords: high-redshift galaxies; active galaxies; quasars; supermassive black holes; star formation; galaxy evolution; early universe; cosmology; observational astronomy; simulations

(This special issue belongs to the Section Galaxies and Clusters)

Variable Stars in the 21st Century: From Microvariability to Megavariability

edited by

Laszlo Szabados

and Tamas Szalai

submission deadline 31 Dec 2025 | 2 articles | Viewed by 2289 | Submission Open

Keywords: stellar variability; sky surveys; time-domain astrophysics; astrophysical transients; individual variable stars

(This special issue belongs to the Section Solar and Stellar Physics)

Challenges and Future Directions in Neutron Star Research

edited by

Polychronis Koliogiannis

and

Charalampos Moustakidis

submission deadline 31 Dec 2025 | 2 articles | Viewed by 1118 | Submission Open

Keywords: compact stars; neutron stars; quark stars; hybrid stars; neutron star mergers; gravitational waves

(This special issue belongs to the Section Compact Objects)

Gamma-Ray Bursts: Unveiling the Mysteries of the Universe’s Most Powerful Explosions

edited by

Yongfeng Huang

, He Gao, Liang Li and Jinjun Geng

submission deadline 31 Dec 2025 | 2 articles | Viewed by 943 | Submission Open

Keywords: prompt emission of gamma-ray bursts; afterglow of gamma-ray bursts; classification of gamma-ray bursts; beaming effects in gamma-ray bursts; central engines of gamma-ray bursts and their prolonged activities; radiation mechanisms of gamma-ray bursts; host galaxies of gamma-ray bursts; cosmological application of gamma-ray bursts; multiwavelength and multi-messenger aspects of gamma-ray bursts; instrumentation for gamma-ray bursts

(This special issue belongs to the Section Space Science)

Astrophysics and Cosmology at High Z

edited by

Júlio César Fabris

and

Hermano Velten

submission deadline 31 Dec 2025 | Viewed by 187 | Submission Open

Keywords: astrophysics; cosmology; high-redshift surveys; structures in the universe; dark sector of the universe

(This special issue belongs to the Section Cosmology)

Magnetized Dense Matter in Compact Stars: From Fundamental Properties to Astrophysical Observables

edited by Efrain J. Ferrer,

Vivian de la Incera

and Cristina Manuel

submission deadline 31 Dec 2025 | Viewed by 134 | Submission Open

Keywords: magnetized relativistic systems; magnetized dense systems; equation of state in magnetized dense systems; rotation in magnetized dense system; cooling in magnetized dense systems; transport properties of magnetized dense systems; topological effects in magnetized dense systems; hadron– quark phase transition in a magnetic field

(This special issue belongs to the Section Compact Objects)

Quantum Gravity Phenomenology: Insights and Advances

edited by

Iarley P. Lobo

submission deadline 31 Dec 2025 | Viewed by 132 | Submission Open

Keywords: Lorentz invariance violation; generalized uncertainty principle; non-Riemannian geometries; entanglement; quantum correlations; ultraviolet/infrared mixing; multi-messenger astrophysics; quantum information

(This special issue belongs to the Section Foundations of Quantum Mechanics and Quantum Gravity)

Studies in Properties of Accretion–Ejection Phenomena Around Black Holes

edited by Chandra Singh,

Kaushik Chatterjee

and

Zhiyuan Pei

submission deadline 31 Dec 2025 | Viewed by 89 | Submission Open

Keywords: accretion; jet; X-ray binaries; ULXs; AGNs; relativistic phenomena; radiation; magnetic field

(This special issue belongs to the Section Compact Objects)

Neutrino Insights: Peering into the Subatomic Universe

edited by Guillermo D. Megias

submission deadline 30 Jan 2026 | 3 articles | Viewed by 2521 | Submission Open

Keywords: neutrino physics; neutrino oscillations; electroweak interactions; CP violation; solar and atmospheric neutrinos; long-baseline accelerators; neutrino-nucleus reactions; low and high energy neutrinos

(This special issue belongs to the Section High Energy Nuclear and Particle Physics)

Applications of Artificial Intelligence in Modern Astronomy

edited by Bo Qiu

submission deadline 30 Jan 2026 | Viewed by 736 | Submission Open

Keywords: artificial intelligence; machine learning; astronomy; deep learning; big data; telescope

(This special issue belongs to the Section Astroinformatics and Astrostatistics)

Exploring and Constraining Alternative Theories of Gravity

edited by

Cláudio Gomes

and

Gonzalo J. Olmo

submission deadline 30 Jan 2026 | Viewed by 228 | Submission Open

Keywords: gravitation; cosmology; modified theories of gravity; scalar– vector– tensor theories; torsion and non-metricity; higher-order theories; models beyond the standard model of particle physics; quantum gravity; inflationary universe; gravitational wave universe; dark universe; observational constraints; ground- and space-based missions

(This special issue belongs to the Section Gravitation)

The Royal Road: Eclipsing Binaries and Transiting Exoplanets, 2nd Edition

edited by Tamás Borkovits and

Szilard Csizmadia

submission deadline 30 Jan 2026 | Viewed by 102 | Submission Open

Keywords: eclipsing binaries; transiting exoplanets; eclipse and transit timing variations; hierarchical multiple systems; multi-planet systems; ellipsoidal; reflection; and beaming effects of binary stars; phase curves of exoplanets; atmospheres of exoplanets; dynamics of multiple systems; formation and evolution of binary systems and planetary systems; interior structure of stars and planets; occurrence rates and frequencies of planets; brown dwarfs; and stars

(This special issue belongs to the Section Planetary Sciences)

Multi-Messenger Astrophysics: Synergies Between Cosmic Rays, Gravitational Waves, Neutrinos, and Electromagnetic Signals

edited by

Gina Isar

and Günter Sigl

submission deadline 31 Jan 2026 | Viewed by 201 | Submission Open

Keywords: cosmic rays and air showers; high-energy gamma-rays and neutrinos gravitational waves; acceleration mechanisms and propagation; cosmic magnetic fields; cosmic ray anisotropies; multi-messenger and multi-wavelength signals; detection methods; hadronic interaction models; machine learning and high performance computing

(This special issue belongs to the Section High Energy Nuclear and Particle Physics)

Relativistic Heavy-Ion Collisions: Theory and Observation

edited by

Jun Xu

and Chunjian Zhang

submission deadline 31 Jan 2026 | Viewed by 122 | Submission Open

Keywords: quark-gluon plasma; transport model; hydrodynamics model; phase diagram; spin polarization; jet; collective flow

(This special issue belongs to the Section High Energy Nuclear and Particle Physics)

Supergravity, Strings, and Related Topics

edited by Yi Pang,

Gabriele Tartaglino-Mazzucchelli

, Robert Saskowski,

Kiril Hristov

and Jun Nian

submission deadline 31 Jan 2026 | Viewed by 70 | Submission Open

Keywords: supergravity; string theory; black holes; branes; AdS/CFT; double/exceptional field theory; higher derivative corrections

(This special issue belongs to the Section Gravitation)

Detection and Tracking of Near-Earth Asteroids

edited by

Haibin Zhao

submission deadline 27 Feb 2026 | Viewed by 110 | Submission Open

Keywords: near-earth asteroids (NEAs); asteroid detection and tracking; asteroid composition and evolution; orbital dynamics; machine learning in astronomy; planetary defense; space-based observations; solar system dynamics

(This special issue belongs to the Section Planetary Sciences)

The Hidden Stories of Small Planetary Bodies

edited by Emese Forgacs-Dajka and Csaba Kiss

submission deadline 28 Feb 2026 | 1 articles | Viewed by 365 | Submission Open

Keywords: small solar system bodies; asteroids and comets; celestial dynamics; survey astronomy; machine learning in planetary science; multi-wavelength observations; data-driven modeling; evolution of minor planets; AI applications in space science; planetary mission science

(This special issue belongs to the Section Planetary Sciences)

The First Stars: Keys to Understanding Dark Matter

edited by

Øyvind Grøn

submission deadline 28 Feb 2026 | Viewed by 359 | Submission Open

Keywords: dark matter; first stars; early universe; WIMPs (weakly interacting massive particles); James Webb Space Telescope

(This special issue belongs to the Section Cosmology)

The Role of Black Hole Growth in Galaxy Formation and Evolution

edited by

Mojtaba Raouf

and Violette Impellizzeri

submission deadline 28 Feb 2026 | Viewed by 105 | Submission Open

Keywords: supermassive black holes; galaxy formation and evolution; active galactic nuclei; star formation rates; gas dynamics; cosmological simulations; black hole mergers; gravitational waves; interstellar medium; structure formation

(This special issue belongs to the Section Gravitation)

Multi-wavelength Properties of Active Galactic Nuclei

edited by

Stefano Vercellone

submission deadline 31 Mar 2026 | 2 articles | Viewed by 2249 | Submission Open

Keywords: active galactic nuclei; black-hole physics; accretion; winds; jets; emission mechanism; theoretical modelling; observing facilities; software and databases

(This special issue belongs to the Section Galaxies and Clusters)

Seyfert Galaxies: Probing the Active Nuclei of Nearby Galaxies

edited by Oli Luiz Dors

submission deadline 31 Mar 2026 | Viewed by 652 | Submission Open

Keywords: galaxies: abundances; ISM: abundances; galaxies: nuclei; galaxies: active; galaxies: high redshift; galaxies: reionization

(This special issue belongs to the Section Galaxies and Clusters)

Exploring the Heavy Ion Collisions in Particle Physics

edited by

Marcello Abbrescia

and

Giuseppe Mandaglio

submission deadline 31 Mar 2026 | Viewed by 429 | Submission Open

Keywords: quark– gluon plasma; hadron resonance; partonic interactions; heavy ion collisions; particle physics; (anti)nuclei formation; physics beyond QCD; detector development; theoretical models

(This special issue belongs to the Section High Energy Nuclear and Particle Physics)

The Lifecycle of Massive Stars

edited by

Jacco Th. van Loon

submission deadline 31 Mar 2026 | Viewed by 215 | Submission Open

Keywords: massive stars; star formation; stellar evolution; stellar mass loss; stellar winds; supernova progenitors; binary stars; stellar magnetism; stellar rotation; population III

(This special issue belongs to the Section Solar and Stellar Physics)

Tensions, Anomalies, and Challenges in the Standard Cosmological Model

edited by

John P. Ralston

and Pavan Kumar Aluri

submission deadline 30 Apr 2026 | 1 articles | Viewed by 878 | Submission Open

Keywords: standard cosmological model— anomalies; tensions; challenges; cosmological principle; Hubble tension; S8 tension; dark matter and dark energy; early- and late-time probes

(This special issue belongs to the Section Cosmology)

General Relativity, Modified Theories of Gravity and Their Applications in Astrophysics

edited by

Xin Wu

and Wenbin Lin

submission deadline 30 Apr 2026 | 1 articles | Viewed by 526 | Submission Open

Keywords: general relativity; modified theories of gravity; cosmology; post-Newtonian approximations; black hole physics; compact objects; numerical integration methods; chaotic dynamics; gravitational waves; planetary dynamics

(This special issue belongs to the Section Gravitation)

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