Maria Gritsevich

Our #MNRAS paper just got published #openaccess at doi.org/10.1093/mnras/… Learn the stages and phenomena related to a space object colliding with our planet and see what constitutes most its atmospheric flight — and most importantly — what is the outcome!

Glad to host in my home town the #THESEUS Conference 2026, supported by @iaa_csic and @InfoUMA. Nearly 100 attendants on-site to show and discuss the last results regarding the scientific goals of this M7 candidate mission selected by @esa for Phase-A study in 2023. @esascience

1/7 A recent study in Nature Astronomy reports a phenomenon never seen before and completely unexpected: a bow shock around the white dwarf RXJ0528+2838, the dense remnant of a low-mass star. #Universe #MilkyWay #ESO

Recent research examining the feasibility of asteroid mining suggests that, despite its long-standing appeal, the concept faces substantial scientific, technical, and economic challenges. By analyzing meteorites that are thought to originate from carbonaceous, C-type asteroids, the most common class in the Solar System, researchers evaluated whether these bodies are realistic targets for resource extraction. The results indicate that many undifferentiated asteroids, similar in composition to chondritic meteorites, contain relatively low concentrations of economically valuable materials, making them poor candidates for mining. More promising targets would be asteroids with specific mineralogical signatures or those rich in hydrated minerals, particularly water, which could be used directly to support space exploration or processed into propellant. The study highlights that a major limitation is still our incomplete knowledge of asteroid interiors, underscoring the importance of additional sample-return missions. It also emphasizes the difficulty of developing extraction and processing technologies that can operate efficiently in microgravity, along with the scale of infrastructure required to make such operations viable. Overall, while asteroid mining remains scientifically interesting and potentially useful for in-space resource utilization, the study concludes that a commercially sustainable industry is unlikely in the near future and will depend on significant advances in both planetary science and space engineering. 👉 share.google/QvWPRtlsnNUUTo…

Simultaneous ground- and space-based observations of a newly discovered free-floating planet have enabled direct measurement of its mass and distance from Earth, according to a new Science study. The findings offer insights into the diverse and dynamic pathways by which planets can be cast adrift into interstellar space. 📄: scim.ag/4phU4RK #SciencePerspective: scim.ag/490QpD1

Mañana, 147.099.928 km nos separan del Sol La Tierra alcanza el perihelio, el punto más cercano al Sol en su órbita 🌞🌍 El disco solar se ve ligeramente más grande: 32 minutos 32 segundos de arco 📐 IMPORTANTE: ¡Mira SOLO con protección adecuada (filtros homologados)! 🔭👁️🕶️🚫

🎄¡Feliz NAVIDAD y nuestros mejores para 2026! ⭐️Merry Christmas and all the best for 2026!!! 🚀Málaga Planetarium... ¡ya queda menos! / coming soon!

The 2026 ESA Hubble and Webb Calendar has landed 📆🚀 The calendar celebrates another year of exciting images and discoveries from Hubble and Webb with beautiful imagery from both missions: planets, star clusters, galaxies, and more! 💫 Download it here: esahubble.org/announcements/… 📷 @ESA / @Hubble_Space , ESA/ @esa_webb

A recent open-access article published in @PASPJournal presents an analysis of surface correction values associated with the measured outbursts from comet 29P/Schwassmann-Wachmann. iopscience.iop.org/article/10.108…. -JGM

Geminids over China's Nianhu Lake #GeminidMeteorShower 📷 Hongyang Luo

@ice_csic @IEEC_space LEAD A PIONEERING STUDY ON THE FEASIBILITY OF ASTEROID #MINING❗️ @EurekAlert echoes #MNRAS @RAS_Journals article ➡️eurekalert.org/news-releases/… Preprint by @Josep_Trigo, @pgrebolt, @JordiIbanez1, J. Alonso & @GritsevichMaria in @arxiv: 🔖arxiv.org/pdf/2510.27373

#COMET #3IATLAS TODAY from #MontsenyObservatory. 17 min. stacked b&w image shows the tail and jet spiral structures coming out from the nucleus. The color image shows the appearance on the telescope. Our study: 🔖arxiv.org/abs/2511.19112… Outreach article ➡️theconversation.com/desvelada-la-n…

@AJCastroTirado We are delighted to announce the forthcoming meeting on 24-26 March (2026) at Málaga (Spain) on the ESA THESEUS mission. We look forward your scientific and instrumental talks! theseus.astro-ge.ch/portail/confer…

Our BOOTES-2 telescope at @IHSM_CSIC_UMA is performing nicely again, once the optics were recoated. It recorded the 14th mag glow of one of the brightest GRB afterglows so far, reported by @GritsevichMaria et al. (GCN 42539). The death of a massive star at 7 billions light-years.

This could make a great phone screensaver, right? 🙂

Northern lights are live right now — watch from anywhere :) auroraskystation.se/en/live-cam/

Comet Lemmon setting over the 3 gossips in Utah.

Comet Lemmon over Red Rock Canyon

Comet Lemmon Before Photoshop Oscar Martín Mesonero 2025 October 27 Encina de San Silvetre, Salamanca, Spain Elon Musk is ruining our skies. At what cost?

A beautiful example of how Pro-Ams can team up with scientists and become co-authors in per-reviewed scientific articles. The corresponding paper ...coming soon!