Space

Researchers have demonstrated that cosmic protons can be utilized to detect thermonuclear weapons deployed on space satellites, thereby offering a method for verifying compliance with the Outer Space Treaty. The findings, published in Nature on July 8, 2026, detail how neutrons induced by spallation from protons in the inner Van Allen radiation belts can be observed using readily available sensor technologies. This detection capability could provide an independent means to identify potential violations of the treaty, which prohibits the placement of weapons of mass destruction in orbit. The study outlines a specific methodology involving the analysis of neutron flux originating from interactions between high-energy protons and satellite materials. When these protons strike a satellite containing fissile material, they can induce spallation reactions, releasing neutrons. By monitoring these neutron emissions with sensitive detectors, it is theoretically possible to infer the presence of a nuclear device. The research emphasizes that the required sensor technology is not prohibitively advanced, suggesting that such verification mechanisms could be implemented relatively soon. This development addresses a long-standing challenge in space governance: the difficulty of monitoring activities in orbit for compliance with international agreements. The Outer Space Treaty, established in 1967, aims to ensure that space is used for peaceful purposes. However, the absence of robust, independent verification mechanisms has raised concerns about potential clandestine military activities. The proposed method using cosmic proton interactions offers a novel, passive detection approach that could enhance transparency and deter potential treaty violations. The implications of this research extend to the broader field of space security and arms control. By providing a potential pathway for detecting illicit nuclear deployments, it could strengthen the effectiveness of existing treaties and inform the development of future regulations governing space activities. The ability to detect such violations without requiring direct access to or inspection of satellites would be a significant advancement in ensuring the peaceful exploration and utilization of outer space.

Miami-based City Labs launched its BOHR satellite on Tuesday, a significant development for commercial nuclear power in space. The satellite, named Betavoltaic Orbital High-Reliability (BOHR), was deployed via a SpaceX rideshare mission carrying 80 other payloads. The SpaceX Falcon 9 rocket successfully placed the BOHR satellite into an orbit ranging from 350 to 400 miles in altitude. This launch represents an initial step towards the larger goal of deploying bona fide nuclear reactors in space, which could be crucial for powering permanent lunar bases and enabling efficient interplanetary rocket propulsion throughout the Solar System. City Labs specializes in nuclear micro-power technology, positioning them at the forefront of this emerging field. The successful deployment of BOHR demonstrates the viability of their technology for orbital applications. While not a full-scale reactor, the BOHR satellite's mission is to test and validate key components and systems related to betavoltaic power generation in the space environment. This technology utilizes the energy released from radioactive decay to generate electricity, offering a long-lasting and reliable power source for space missions. The company's focus on high reliability is essential for the demanding conditions of space. The achievement by City Labs could pave the way for future advancements in space exploration and infrastructure, reducing reliance on solar power in regions with limited sunlight and enabling more ambitious deep-space missions.

This week, Nature commemorates three decades since the birth of Dolly the sheep, a landmark event in cloning technology. The publication reflects on the profound scientific advancements and ethical discussions that have emerged over the past 30 years, stemming from the successful cloning of a mammal. Dolly's creation in 1996 at the Roslin Institute in Scotland by scientists Keith Campbell and Ian Wilmut marked a pivotal moment in biotechnology, opening new avenues for research in genetics, developmental biology, and medicine. The review also delves into current scientific understanding regarding the prevention of dementia. It synthesizes recent findings and expert opinions on lifestyle factors, genetic predispositions, and potential therapeutic interventions that may help stave off cognitive decline. The article highlights the ongoing efforts to unravel the complex mechanisms underlying neurodegenerative diseases and to develop effective strategies for early detection and treatment. Furthermore, the Nature piece includes a compelling call to action for the preservation of the Hubble Space Telescope. It underscores the telescope's invaluable contributions to astronomy and astrophysics over its decades of operation, providing unprecedented views of the universe. The article emphasizes the scientific and cultural importance of maintaining such critical observational tools for future generations of researchers and for expanding humanity's knowledge of the cosmos. The combined focus on cloning, neuroscience, and space exploration underscores the breadth of scientific inquiry and the long-term impact of groundbreaking discoveries.