In a new study, University of Washington researchers show that an Earth-sized planet likely needs at least 20 to 50% of the water in Earth’s oceans to maintain a critical natural cycle that keeps water on the surface. These new parameters could exclude many exoplanets in the so-called habitable zone.

Astronomers are puzzled by the existence of extremely massive black holes—up to a billion times the mass of the Sun—forming less than a billion years after the Big Bang, far earlier than current theories predict. Standard models of black hole growth cannot explain how they became so large so quickly. New research suggests that energy from decaying dark matter may have altered early galaxies’ chemistry, allowing some to collapse directly into massive black holes instead of forming stars.

Astronomers at The University of New Mexico have recently published new research confirming three bodies orbiting the dynamic exoplanet system TOI-201. They include a super-earth (TOI-201 d), a warm Jupiter (TOI-201 b) and a brown dwarf (TOI-201 c). Ismael Mireles, a PhD candidate in the UNM Department of Physics and Astronomy advised by Professor Diana Dragomir, led the research. The paper titled, “Uncovering the Rapidly Evolving Orbits of the Dynamic TOI-201 System” is published in Science Advances.

Penn physicist Patricio Gallardo and collaborators tracked the speeds of distant galaxy clusters to test the strength of gravity across hundreds of millions of light-years. The verdict? Gravity neatly matches the classic equations written by Newton and Einstein. By proving the fundamental laws of physics span these massive cosmic scales, the results leave little doubt that invisible dark matter exists.

A new study published in Big Earth Data systematically evaluates the data quality of Volunteered Geographic Information (VGI) in ecological conservation applications. Focusing on red-crowned crane habitats in Hokkaido, Japan, the research compares VGI data from eBird and OpenStreetMap (OSM) against authoritative datasets from GBIF and CASEarth. The findings indicate that while VGI demonstrates higher thematic accuracy and broader spatial coverage for vector-based species distribution data, OSM exhibits significant classification errors and coverage gaps in raster-based land use data, particularly for croplands and grasslands. This study underscores the critical need for tailored validation strategies across different VGI types to enhance their utility in ecological research.

As the demand for constructing lunar and Martian bases continues to rise, lava tubes—with their unique advantages such as natural shielding from cosmic radiation, thermally stable conditions, and ready-to-use subsurface living spaces—have become a core consideration for deep space exploration and the selection of long-term extraterrestrial base sites. Compared to traditional methods relying solely on surface rovers or single-sensor orbital identification, future scientific exploration of lunar and Martian lava tubes requires a systematic approach to address key questions: "Where are they?", "What do they look like?", "How do we explore them?", and "How do we use them?" This necessitates the establishment of a comprehensive, multi-dimensional detection system.

Recently, a study published in the journal Space: Science & Technology focused on the Jingpo Lake lava tube as a typical terrestrial analog site. Led by China University of Geosciences (Beijing) in collaboration with domestic and international research teams, including the Aerospace Information Research Institute, Chinese Academy of Sciences; Heilongjiang Second Surveying and Mapping Engineering Institute; Peking University; Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences; Chengdu University of Technology; and the University of Padova, Italy, a comprehensive five-year scientific investigation was conducted. Leveraging the Jingpo Lake lava tube network in Heilongjiang Province and taking advantage of the environmental conditions during winter when liquid water is absent—thereby simulating lunar lava tube exploration scenarios—this study carried out multi-sensor, integrated ground-air-space surveys. For the first time, an integrated ground-air-space exploration scheme for lava tubes was proposed. This scheme integrates multi-source detection technologies, including spaceborne synthetic aperture radar (SAR), UAV-based close-range photogrammetry, airborne LiDAR, in-tube GeoSLAM, hyperspectral LiDAR, and ground-penetrating radar (GPR). A multi-platform, multi-scale collaborative survey of the Jingpo Lake lava tube area was conducted, establishing a complete technical chain from surface skylight identification and subsurface void detection to the precise acquisition of in-tube geometric and spectral information. This work provides a robust terrestrial analog validation foundation and technical reference for future comprehensive lunar lava tube exploration.