Peer review is an essential part in the publication process, ensuring that Galaxies maintains high quality standards for its published papers. In 2017, a total of 99 papers were published in the journal. Thanks to the cooperation of our reviewers, the median time to first decision was 25 days and the median time to publication was 49 days. The editors would like to express their sincere gratitude to the following reviewers for their time and dedication in 2017:
| Alamo-Martínez, Karla | Laing, Robert |
| Aller, Margo | Lamata, Lucas |
| Amorisco, Nicola | Lambiase, Gaetano |
| Amorisco, Nicola C. | Larionov, Valeri |
| Angelakis, Emmanouil | Larsen, Soeren |
| Arshakian, Tigran G. | Laura, Greggio |
| Asorey, Manuel | Li, Baojiu |
| Bachev, Rumen | Li, Jian |
| Bailin, Jeremy | Lineweaver, Charley |
| Banik, Indranil | Liodakis, Ioannis |
| Barres de Almeida, Ulisses | Liu, Xiang |
| Basano, Lorenzo | Macdonald, Nicholas Roy |
| Bassino, Lilia | Marscher, Alan |
| Basu, Aritra | Marshall, Herman |
| Beaklini, Pedro P. B. | Martin, Nicolas F. |
| Beckwith, Andrew Walcott | Marti-Vidal, Ivan, |
| Bell, Eric | Meliani, Zakaria |
| Bellstedt, Sabine | Merrifield, Michael |
| Beltran Jimenez, Jose | Meyer, Eileen |
| Berton, Marco | Mielke, Eckehard W. |
| Bisikalo, Dmitry | Migliori, Giulia |
| Blázquez-Salcedo, Jose Luis | Millas, Dimitrios |
| Blinov, Dmitry | Miller, Bryan |
| Boettcher, Markus | Miller, Dick |
| Bojowald, Martin | Millington, Peter |
| Bozza, Valerio | Mimoso, José Pedro |
| Buitrago, Fernando | Mobed, Nader |
| Cai, Yi-Fu | Moffat, John W. |
| Capozziello, Salvatore | Molina, Sol Natalia |
| Carini, Michael | Morelli, Lorenzo |
| Carlin, Jeffrey | Moscibrodzka, Monika |
| Casadio, Carolina | Myserlis, Ioannis |
| Caso, Juan Pablo | Nalewajko, Krzysztof |
| Cembranos, J. A. R. | Nishikawa, Kenichi |
| Chan, Man Ho | Nojiri, Shin’ichi |
| Chies Santos, Ana | Nouri-Zonoz, Mohammad |
| Cohen, Marshall H. | Odintsov, Sergei |
| Collins, Michelle | Ohta, Nobuyoshi |
| Contopoulos, Ioannis | Oksanen, Markku |
| Crnojevic, Denija | Oliveira, Claudia |
| D’Ammando, Filippo | Ostrowski, Michał |
| Das, Saurya | Paneque, David |
| Dasgupta, Keshav | Park, Hong Soo |
| De Diego, José A. | Pasetto, Alice |
| De La Cruz-Dombriz, Alvaro | Podgornik, Rudi |
| Deng, Wei | Potter, William John |
| Duc, Pierre-Alain | Pushkarev, Alexander |
| Eckert, Dominique | Rachen, Jörg P. |
| Ernest, Allan | Ramirez, C. |
| Faifer, Favio Raúl | Rejkuba, Marina |
| Fan, Junhui | Remus, Rhea-Silvia |
| Favole, Ginevra | Rodrigues, Davi |
| Fedorova, Elena | Rubiera-Garcia, Diego |
| Feoli, Antonio | Russell, David |
| Ferrer, Francesc | Sadun, Alberto C. |
| Forbes, Duncan | Salinas, Ricardo |
| Foschini, Luigi | Sand, David |
| Fraija, N. | Savolainen, Tuomas.k. |
| Gabuzda, Denise | Schulze, Felix |
| Gasparrini, D. | Sebastiani, Lorenzo |
| Gasperini, Maurizio | Sharina, Margarita |
| Gilbert, Karoline | Shlosman, Isaac |
| Glushkova, Elena | Sil’chenko, Olga |
| Gupt, Brajesh | Spencer, Ralph E. |
| Harris, William | Stamerra, Antonio |
| Homan, Daniel | Tartaglia, Angelo |
| Hovatta, Talvikki | Tasson, Jay |
| Hudson, Michael | Tomasiello, Alessandro |
| Ita, Eyo | Trigo-Rodríguez, Josep M. |
| Ivashchuk, V. D. | Trushkin, Sergei |
| Johnson, Michael D. | Trushkin, Sergey A. |
| Johnston, Kathryn | Valcarcel, Jorge Gigante |
| Jorstad, Svetlana | Vazza, Franco |
| Kim, Dong-Woo | Vilja, Iiro |
| Kobayashi, Shiho | Walker, Robert Craig |
| Kobayashi, Takeshi | Wardle, John |
| Koivisto, Tomi | Wierzcholska, Alicja |
| Kotanjyan, Anna | Willingale, Richard |
| Kovalev, Yuri | Wu, Xue-Feng |
| Krämer, Manuel | Yuan, Zunli |
| Kravchenko, Evgeniya | Zhang, Haocheng |
| Krššák, Martin | Zhang, Xiangdong |
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