Earth system science

New research reported by AAS Nova suggests the Solar System's expected lifetime is roughly a billion times shorter than previously estimated, pointing to far greater long-term instability in planetary orbits. The finding revises how long the current planetary arrangement can persist before gravitational interactions between planets destabilise it, prompting discussion among astronomers and science readers about what this means for Earth's distant future.

A newly published study finds that Earth and Mars were formed through fundamentally different processes, challenging the idea that rocky planets in our solar system grew up in similar ways. The research suggests the two neighboring planets followed distinct formation paths from the earliest days of the solar system. Space and science communities are sharing the findings, with discussion focusing on what this means for how planets like ours develop.

A new report argues that the solar system is fundamentally unstable, with planetary orbits shifting chaotically over long timescales and potentially leading to collisions or planets being ejected. Scientists have long modeled these gravitational instabilities, and renewed attention to the findings is prompting discussion about Earth's eventual fate in the distant future.

Science on a Sphere, a spherical visualization system developed by the National Oceanic and Atmospheric Administration and featured by the Smithsonian, projects planetary data onto a giant suspended globe. It displays animations of ocean currents, weather patterns and climate data, and is used in museums and science centers worldwide to explain Earth systems to the public.

Astronomers have reported detecting a radio signal from Beta Pictoris b, a giant exoplanet orbiting the young star Beta Pictoris about 63 light-years from Earth. The observation, covered by science outlets, is drawing attention because radio emissions from a planet beyond the solar system could offer a new way to study exoplanets' magnetic fields and atmospheres.

Japanese media report that scientists found tiny microorganisms living near undersea hydrothermal vents off Okinawa, suggesting similar microbes could survive on Enceladus, Saturn's ice-covered moon. The findings support the idea that conditions beneath Enceladus's icy crust might be capable of hosting life, a question driving interest in future missions to the Saturn system.

Researchers writing in Nature argue that environmental legal frameworks need to be updated to reflect Earth system dynamics, meaning the interconnected processes that regulate the planet's climate, ecosystems and stability. They say current laws treat environmental problems in isolation, while issues like climate change and biodiversity loss interact across scales, and legal systems must evolve to manage these systemic risks effectively.

A new study argues that Earth and Mars formed from the same primordial cloud of dust in the early solar system, yet followed very different developmental paths. Researchers suggest differences in size, composition and early conditions drove the two planets onto sharply divergent evolutionary tracks, helping explain why only one became habitable. The findings are drawing attention among planetary scientists and space enthusiasts.

NASA reports that the James Webb Space Telescope has provided new insights into colossal planet-destroying collisions, capturing observations of debris and aftermath from impacts between planetary bodies. The findings give scientists a rare look at the violent processes that shape planetary systems, echoing the kind of giant impact thought to have formed Earth's Moon.

NASA's OSIRIS-REx mission brought samples of asteroid Bennu back to Earth, and analyses show the space rock contains material from both the inner and outer reaches of the Solar System. Researchers describe Bennu as a kind of 'Frankenstein' asteroid, assembled from fragments with very different origins, offering new clues about how the Solar System formed.