Nature Astronomy最新文献

{"title":"The Juneteenth issue","authors":"","doi":"10.1038/s41550-025-02603-w","DOIUrl":"10.1038/s41550-025-02603-w","url":null,"abstract":"Against a background of threats to science and personal identity, this month we highlight a score of Black astronomers trying to pursue their ambitions without fear, and Black In Astro, an organization supporting predominantly early-career Black people working in the space sciences.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"9 6","pages":"749-749"},"PeriodicalIF":14.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41550-025-02603-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Black in stellar astrophysics","authors":"James O. Chibueze, Samaiyah Farid, India Jackson, Teresa Monsue, Miriam M. Nyamai","doi":"10.1038/s41550-025-02578-8","DOIUrl":"10.1038/s41550-025-02578-8","url":null,"abstract":"As part of Black Space Week 2025, five stellar astrophysicists and solar physicists share information about their scientific interests, research projects and personal motivations for working in astronomy.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"9 6","pages":"760-766"},"PeriodicalIF":14.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A little red dot up close","authors":"Lindsay Oldham","doi":"10.1038/s41550-025-02599-3","DOIUrl":"10.1038/s41550-025-02599-3","url":null,"abstract":"","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"9 6","pages":"776-776"},"PeriodicalIF":14.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"‘Know thy star’ consistently","authors":"Luca Maltagliati","doi":"10.1038/s41550-025-02600-z","DOIUrl":"10.1038/s41550-025-02600-z","url":null,"abstract":"","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"9 6","pages":"777-777"},"PeriodicalIF":14.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Black in (exo)planetary science","authors":"Keanna Jardine, Caprice L. Phillips, Kayla J. Smith, Dakotah Tyler, Ashley Walker, Robert Washington III","doi":"10.1038/s41550-025-02585-9","DOIUrl":"10.1038/s41550-025-02585-9","url":null,"abstract":"As part of Black Space Week 2025, six (exo)planetary scientists share information about their scientific interests, research projects and personal motivations for working in astronomy.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"9 6","pages":"754-759"},"PeriodicalIF":14.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In search of signs of life on Mars with China’s sample return mission Tianwen-3","authors":"Zengqian Hou, Jizhong Liu, Fuchuan Pang, Yuming Wang, Yiliang Li, Mengjiao Xu, Jianya Gong, Kun Jiang, Zhizhong Kang, Yangting Lin, Jia Liu, Yang Liu, Yang Li, Liping Qin, Zhenfeng Sheng, Chi Wang, Juntao Wang, Guangfei Wei, Long Xiao, Yigang Xu, Bingkun Yu, Renhao Ruan, Chaolin Zhang, Yu-Yan Sara Zhao, Xin Zou","doi":"10.1038/s41550-025-02572-0","DOIUrl":"10.1038/s41550-025-02572-0","url":null,"abstract":"The aim of China’s Mars sample return mission, known as Tianwen-3, is to collect at least 500 g of samples from Mars and return them to Earth around 2031. Here we summarize the scientific objectives of Tianwen-3 and discuss the concept of the mission, from selecting the payload to curating the sample. The mission aims to provide insights into nine scientific themes centred around the main focus of the search for extant and past life on Mars. These nine themes, together with requirements based on technical capabilities, inform the selection of the payload. We present preliminary studies on a full-chain protocol and the strategy for the selection of the landing site and detection of potential biosignatures in the returned samples. We also propose, in strict accordance with the Committee on Space Research’s Planetary Protection Policy, an integrated plan for sample preservation and analysis. This plan involves the establishment of the Mars Sample Laboratory to conduct a comprehensive examination of the returned Mars samples and safeguard Earth against potential exobiological contamination. China is planning to launch its Tianwen-3 mission, with the purpose of bringing back a sample from Mars, by the end of the decade. This Perspective presents the scientific objectives and architecture of Tianwen-3, including a preliminary selection of landing sites and a description of the Mars Sample Laboratory that will curate the material on Earth.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"9 6","pages":"783-792"},"PeriodicalIF":14.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144319834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Black in cosmology","authors":"John. C. Hood II, Marcell Howard, Elizabeth Meador","doi":"10.1038/s41550-025-02577-9","DOIUrl":"10.1038/s41550-025-02577-9","url":null,"abstract":"As part of Black Space Week 2025, two cosmologists and an astroparticle physicist share information about their scientific interests, research projects and personal motivations for working in astronomy.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"9 6","pages":"772-774"},"PeriodicalIF":14.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A gas-rich cosmic web revealed by the partitioning of the missing baryons","authors":"Liam Connor, Vikram Ravi, Kritti Sharma, Stella Koch Ocker, Jakob Faber, Gregg Hallinan, Charlie Harnach, Greg Hellbourg, Rick Hobbs, David Hodge, Mark Hodges, Nikita Kosogorov, James Lamb, Casey Law, Paul Rasmussen, Myles Sherman, Jean Somalwar, Sander Weinreb, David Woody, Ralf M. Konietzka","doi":"10.1038/s41550-025-02566-y","DOIUrl":"10.1038/s41550-025-02566-y","url":null,"abstract":"Approximately half of the Universe’s dark matter resides in collapsed halos; significantly less than half of the baryonic matter (protons and neutrons) remains confined to halos. A small fraction of baryons are in stars and the interstellar medium within galaxies. The majority are diffuse (<10−3 cm−3) and ionized (neutral fraction <10−4), located in the intergalactic medium (IGM) and in the halos of galaxy clusters, groups and galaxies. This diffuse ionized gas is notoriously difficult to measure, but has wide implications for galaxy formation, astrophysical feedback and precision cosmology. Recently, the dispersion of extragalactic fast radio bursts (FRBs) has been used to measure the total content of cosmic baryons. Here we present a large cosmological sample of FRB sources localized to their host galaxies. We have robustly partitioned the missing baryons into the IGM, galaxy clusters and galaxies, providing a late-Universe measurement of the cosmic baryon abundance, $${varOmega }_{{mathrm{b}}}{h}_{70}=0.05{1}_{-0.006}^{+0.006}$$ , where Ωb is the baryon density parameter and h70 is the scaled Hubble constant. Our results indicate efficient feedback processes that can deplete galaxy halos and enrich the IGM (total baryon fraction in the IGM is $${f}_{{rm{IGM}}}=0.7{6}_{-0.11}^{+0.10}$$ ), agreeing with the baryon-rich cosmic web scenario seen in cosmological simulations. Our results may reduce the ‘S8 tension’ in cosmology, as strong feedback leads to suppression of the matter power spectrum. Using a large cosmological sample of FRBs, Connor et al. have located many of the Universe’s unseen baryons, finding that most reside in the diffuse intergalactic medium, not galaxies—confirming the strong astrophysical feedback seen in simulations.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"9 8","pages":"1226-1239"},"PeriodicalIF":14.3,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deep chemical weathering on ancient Mars landscapes driven by erosional and climatic patterns","authors":"Rhianna D. Moore, Timothy A. Goudge, Athanasios Klidaras, Briony H. N. Horgan, Adrian Broz, Robin Wordsworth, William H. Farrand","doi":"10.1038/s41550-025-02584-w","DOIUrl":"10.1038/s41550-025-02584-w","url":null,"abstract":"Across Mars exist thick clay mineral-bearing stratigraphies (CSs), thought to have formed through top-down leaching early in Mars’s geological history (>3.7 billion years ago) under warmer, wetter conditions than at present. On Earth, such deposits require specific landscape and climatic conditions to develop; however, it is unclear how Mars’s local and global topographic variations and past climate activity influenced surface weathering and CS formation. Here we present observations that show that CSs tend to occur in areas where chemical weathering was favoured over physical erosion, farther from valley network activity and nearer standing bodies of water. We conclude that the development of thick CSs through enhanced chemical weathering on this tectonically inactive planet may have led to an imbalanced weathering–climate feedback compared with Earth. Our results support the hypothesis that long-term irreversible sequestration of water and cations within clay minerals may have inhibited hydrological activity, and potentially carbonate mineral formation, over time. New findings reveal how terrain influenced Mars’s early surface evolution, allowing regions of stable chemical weathering to develop and permanently trap water and minerals, weakening Mars’s climate feedback and limiting long-term hydrological activity.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"9 8","pages":"1167-1175"},"PeriodicalIF":14.3,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A massive planet with a low-mass host challenges formation theories","authors":"","doi":"10.1038/s41550-025-02560-4","DOIUrl":"10.1038/s41550-025-02560-4","url":null,"abstract":"A giant exoplanet has been discovered transiting a star with a mass just 20% of that of the Sun. This exoplanetary system poses a challenge to the current understanding of how giant planets form.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"9 7","pages":"949-950"},"PeriodicalIF":14.3,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144278566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}