The editorial team greatly appreciates the reviewers who have dedicated their considerable time and expertise to the journal’s rigorous editorial process over the past 12 months, regardless of whether the papers are finally published or not. In 2019, a total of 89 papers were published in the journal, with a median time to first decision of 22 days and a median time from submission to publication of 58 days. The editors would like to express their sincere gratitude to the following reviewers for their generous contribution in 2019:
| Akahori, Takuya | Mangalam, Arun |
| Akiyama, Kazunori | Marmet, Louis |
| Aller, Margo | Marscher, Alan P. |
| Ayala Solares, Hugo A. | Martin, John |
| Beaklini, Pedro P. B. | Marzari, Francesco |
| Beck, Rainer | Massey, Philip |
| Beckwith, Andrew | Mastichiadis, Apostolos |
| Benbow, Wystan | Matson, Rachel |
| Berg, Danielle | Meynet, Georges |
| Birnholtz, Ofek | Michel, Florent |
| Boettcher, Markus | Mielke, Eckehard |
| Bondarescu, Ruxandra | Mignani, Roberto |
| Brandenburg, Axel | Miller, H. Richard |
| Bruzual, Gustavo R. | Millington, Peter |
| Cai, Yi-Fu | Mimoso, José Pedro |
| Calore, Francesca | Mingo, Beatriz |
| Caprioli, Damiano | Mirabal, Néstor |
| Casadio, Carolina | Moliné, Ángeles |
| Chakraborty, Nachiketa | Monaco, Pierluigi |
| Chamandy, Luke | Moss, David |
| Chan, Man Ho | Motter, Juliana Cristina |
| Channuie, Phongpichit | Nagai, Hiroshi |
| Charles, Eric | Nakanishi, Hiroyuki |
| Chisholm, John | Nalewajko, Krzysztof |
| Chu, Ming Chung | Neronov, Andrii |
| Daniela, Bettoni | Ng, Stephen Chi-Yung |
| De Diego, José A. | Nian, Jun |
| De Freitas-Pacheco, José Antonio | Oksanen, Markku |
| De Martino, Ivan | Owen, James |
| Del Sordo, Stefano | Paschalidis, Vasileios |
| Del Sordo, Fabio | Pasetto, Alice |
| Dev, Bhupal | Patricelli, Barbara |
| Di Mauro, Mattia | Pavlidou, V. |
| Dickey, John | Perivolaropoulos, Leandros |
| Dietrich, Tim | Philippov, Alexander (Sasha) |
| Dimitrijevic, Milan | Pihajoki, Pauli |
| Edwards, Philip G. | Pourbaix, Dimitri |
| Ernest, Allan | Quarles, Billy |
| Fedorova, Elena | Ramakrishnan, Venkatessh |
| Feng, Qi | Ramirez, Cupatitzio |
| Fletcher, Andrew | Rueda, Jorge |
| Forrest, Ben | Rybizki, Jan |
| Foschini, Luigi | Sadun, Alberto C. |
| Fossati, Luca | Sanguineti, Matteo |
| Gabici, Stefano | Schäfer, Björn Malte |
| Gaite, Jose | Schober, Jennifer |
| Gastaldello, Fabio | Sedrakian, Armen |
| Gazeas, Kosmas | Seethapuram Sridhar, Sarrvesh |
| Gheller, Claudio | Shlosman, Isaac |
| Giocoli, Carlo | Sigl, Günter |
| Goyal, Arti | Smith, Paul |
| Guendelman, Eduardo | Sokoloff, Dmitry |
| Gupta, Alok C. | Spyrou, Nikolaos K. |
| Harko, T. | Sreckovic, Vladimir A. |
| Haverkorn, Marijke | Stepanian, Arman |
| Hayward, Chris | Stref, Martin |
| Herrero, Artemio | Sun, Xiaohui |
| Hiriart, David | Sur, Sharanya |
| Hodgson, Jeffrey | Takizawa, Motokazu |
| Hütten, Moritz | Terrien, Ryan |
| Ideguchi, Shinsuke | Tomankova, Lenka |
| Ivashchuk, V. D. | Trushkin, Sergey A. |
| Jorstad, Svetlana G. | Turrini, Diego |
| Kashi, Amit | Ueta, Toshiya |
| Kelly, Bernard | Vacca, Valentina |
| King, Andrew | Vagnozzi, Sunny |
| Klypin, Anatoly | Van Eck, Cameron |
| Koenigsberger, Gloria | Vandenbroucke, Justin |
| Kole, Merlin Reynaard | Veres, Péter |
| Koliopanos, Filippos | Viel, Matteo |
| Komissarov, Serguei S. | Vink, Jorick |
| Kozlov, Mikhail | Vink, Jacco |
| Kudritzki, Rolf | Vittino, Andrea |
| L’Huillier, Benjamin | Watson, Scott |
| Lacroix, Thomas | Webb, James R. |
| Lagadec, Eric | Weis, Kerstin |
| Laing, Robert | Welsh, William F. |
| Lamers, Henny | Wiita, Paul |
| Larionov, Valeri | Yang, Lili |
| Lavalle, Julien | Yuan, Zunli |
| Lepe, Samuel | Zacharias, Michael |
| Li, Xiaocan | Zaninetti, Lorenzo |
| Lico, Rocco | Zhang, Haocheng |
| Luongo, Orlando | Zhang, Dong |
| Ma, Yik Ki | Zhuk, Alexander |
| Maldonado Torralba, Francisco José |
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