Peer review is an essential part in the publication process, ensuring that Universe maintains high quality standards for its published papers. In 2017, a total of 84 papers were published in the journal. Thanks to the cooperation of our reviewers, the median time to first decision was 26.5 days and the median time to publication was 53.5 days. The editors would like to express their sincere gratitude to the following reviewers for their time and dedication in 2017:
| Abreu, Everton M.C. | Huovinen, Pasi | Ralston, John P. |
| Ahn, Changhyun | Iazeolla, Carlo | Ran, Shi Ju |
| Alesci, Emanuele | Ichiki, Kiyotomo | Ribeiro, Haroldo Valentin |
| Andrew, Keith | Ida, Daisuke | Robles-Perez, Salvador |
| Apolo, Luis | Iorio, Lorenzo | Rodrigues, Davi C. |
| Astorino, Marco | Ita, Eyo | Rogers, Adam |
| Avramidi, Ivan | Ivanov, Yu. B. | Roy, Victor |
| Ayriyan, Alexander | Jannes, Gil | Rubiera-Garcia, Diego |
| Bamba, Kazuharu | Jetzer, Philippe | Saez-Gomez, Diego |
| Bandos, Igor | Joung, Euihun | Sahu, Kailash |
| Bartelmann, Matthias | Kajantie, Keijo | Saikawa, Kenichi |
| Bass, Steven D. | Kanno, Sugumi | Sanchez-Puente, Antonio |
| Battistelli, Elia Stefano | Karpenko, Iurii | Sánchez-Salcedo, F. Javier |
| Bazavov, Alexei | Karsch, Frithjof | Saridakis, Emmanuel N. |
| Beccaria, Matteo | Keresztes, Zoltan | Sarkar, Debajyoti |
| Bekaert, Xavier | Kessel, Pan | Scarpa, Riccardo |
| Berengut, Julian | Kevin, Stovall | Schmitt, Andreas |
| Besnard, Fabien | Khlopov, Maxim Yu. | Schombert, James |
| Bizouard, Marie-Anne | Kimura, Rampei | Sedrakian, Armen |
| Björn, Schenke | Kiss, Miklós | Sezgin, E. |
| Boehmer, Christian G. | Kitajima, Naoya | Shao, Lijing |
| Bon, Edi | Klein, Antoine | Sharif, M. |
| Bonezzi, Roberto | Koivisto, Tomi | Shen, Chun |
| Bopp, Fritz | Konoplya, Roman | Shikano, Yutaka |
| Bouhmadi-López, Mariam | Kopeikin, Sergei | Shtanov, Yuri |
| Braden, Jonathan | Korbel, Jan | Shuryak, Edward |
| Bravetti, Alessandro | Kozlov, Mikhail | Siklér, Ferenc |
| Brill, Dieter | Kroupa, Pavel | Silagadze, Zurab Karlovich |
| Burdin, Sergey | Kun, Emma | Singleton, Douglas |
| Busti, Vinicius | Lambiase, Gaetano | Sisterna, Pablo D. |
| Cacciatori, Sergio L. | Lee, Chung-Chi | Skvortsov, Evgeny |
| Carballo-Rubio, Raúl | Lee, Chien-Hsiu | Slagter, Reinoud |
| Chamoun, N. | Leibundgut, Bruno | Sleight, Charlotte |
| Cheung, Yeuk-Kwan E. | Lelli, Federico | Sloan, David |
| Christensen, Christian Holm | León, Edgar | Smolić, Ivica |
| Corda, Christian | Lökös, Sándor | Soda, Jiro |
| Covi, Laura | Luongo, Orlando | Soffel, Michael |
| Cristallo, Sergio | Macedo, Caio | Solà Peracaula, Joan |
| Csörgő, Tamás | Maluf, José Wadih | Soloviev, Vladimir O. |
| Dąbrowski, Mariusz P. | Marciano, Antonino | Song, Huichao |
| Dai, Wu-Sheng | Marfatia, Danny | Sorokin, Dmitri |
| De Felice, Antonio | Marra, Valerio | Spagnolo, Nicolò |
| De Laurentis, Mariafelicia | Martín-Moruno, Prado | Srednicki, Mark |
| De Martino, Ivan | Máté, Csanád | Steinhoff, Jan |
| De Rham, Claudia | Matsumoto, Jiro | Stuchlik, Zdenek |
| Del Popolo, A. | Meissner, Krzysztof A. | Suhr, Stefan |
| Demianski, Marek | Merritt, David | Sultana, Joseph |
| Di Giacomo, Adriano | Metsaev, Ruslan | Šumbera, Michal |
| Didenko, Vyacheslav | Michel, Florent | Sun, Jia Rui |
| Ding, Gui-Jun | Michimura, Yuta | Takamizu, Yuichi |
| Dragon, Norbert | Minazzoli, Olivier | Taronna, Massimo |
| Duff, Michael | Minguzzi, Ettore | Thompson, Rodger I. |
| Dymnikova, Irina | Mirshekari, Saeed | Torrieri, Giorgio |
| Emelyanov, Viacheslav | Mitra, Abhas | Tsai, Yue-Lin Sming |
| Ettori, Stefano | Moffat, John | Tseytlin, Arkady |
| Fabbri, Alessandro | Molnar, Emil | Tura I Brugués, Jordi |
| Fabris, Júlio César | Moncrief, Vincent | Valentino, Eleonora Di |
| Fernando, Sharmanthie | Mück, Wolfgang | Valkenburg, Wessel |
| Ferraro, Rafael | Mueller, Berndt | Varga, Dezső |
| Ferreira, Ricardo José Zambujal | Nara, Yasushi | Vasiliev, Mikhail A. |
| Finazzi, Stefano | Nomura, Takaaki | Vassilevich, Dmitri |
| Fletcher, Samuel C. | Novák, Tamás | Velichova, Daniela |
| Franco, Nicolas | Nugier, Fabien | Velten, Hermano |
| Frassino, Antonia M. | Odintsov, Sergei | Venturi, Giovanni |
| Gaitanos, Theodoros | Oikonomou, Vasilis K. | Vilasi, Gaetano |
| Garattini, Remo | Olive, Keith | Visinelli, Luca |
| Garecki, Janusz | Olmedo, Javier | Vovchenko, Volodymyr |
| Gavrilik, A | Olmo, Gonzalo | Vuorinen, Aleksi |
| Gazeau, Jean Pierre | Olson, Jay | Waldron, Andrew |
| Gergely, László | Ong, Yen Chin | Wang, Sai |
| Gerosa, Davide | Orsaria, Milva Gabriela | Wang, Anzhong |
| Ghiglieri, Jacopo | Övgün, Ali | Way, Michael J. |
| Giedt, Joel | Page, Don | Wendt, Martin |
| Gielen, Steffen | Pajares, Carlos | West, Peter |
| Giombi, Simone | Palla, Laszlo | Whitaker, M.A.B. |
| Gong, Yungui | Pan, Supriya | Wildberger, N.J. |
| Gorbenko, Victor | Pang, Yi | Wilk, Grzegorz |
| Gourgouliatos, Konstantinos | Pang, Long-Gang | Wu, W.L. Kimmy |
| Grammenos, Theofanis | Panotopoulos, Grigoris | Wyrzykowski, Lukasz |
| Grigoriev, Maxim | Papadimitriou, Ioannis | Xu, Jun |
| Grøn, Øyvind | Papadopoulos, Athanase | Yang, I-Sheng |
| Guendelman, Eduardo | Partouche, Hervé | Yasusada, Nambu |
| Gupt, Brajesh | Pasechnik, Roman | Yeom, Dong-han |
| György, Wolf | Pauco, R. | Zaccolo, Valentina |
| Hamber, Herbert | Peng, Cheng | Zakharov, Alexander |
| Hardal, Ali Ümit Cemal | Pérez, Alfredo | Zaninetti, Lorenzo |
| Harms, Benjamin C. | Perivolaropoulos, Leandros | Zerbini, Sergio |
| Hatta, Yoshitaka | Petrov, Alexander N. | Zhang, Weining |
| Hehl, Friedrich W. | Polarski, David | Zhang, Xiangdong |
| Hendi, Seyed Hossein | Ponomarev, Dmitry | Zhang, Yi |
| Hidalgo, Juan Carlos | Poplawski, Nikodem | Zhao, Hongsheng |
| Hilditch, David | Pour-Imani, Hamed | Zilhao, Miguel |
| Hiramatsu, Takashi | Primack, Joel R. | Zimborás, Zoltán |
| Hlozek, Renée | Prok, István | Zlosnik, Thomas |
| Ho, Wynn | Pullin, Jorge | |
| Ho, Pei-Ming | Radi, Amr |
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