All articles tagged with #solar system formation
A new study published in Science Advances uses isotope analysis of OSIRIS-REx samples to determine that asteroid Bennu formed near the water-ice line, not in the outer solar system. This finding suggests Jupiter acted as a filter, allowing fine dust from both inner and outer regions to mix and form a hybrid body.
New analysis of 120 grams of regolith returned from asteroid Bennu by NASA’s OSIRIS-REx mission suggests the body formed in a transition zone near the water-ice line, rather than the distant outer solar system. Researchers at ETH Zurich and Lawrence Livermore National Laboratory found that iron and titanium isotopes in the samples are remarkably consistent, linking Bennu to a mixed dust reservoir shaped by early Jupiter. This finding challenges previous assumptions that Bennu originated in the same region as comets, proposing instead that it accreted fine dust from both inner and outer solar system regions, filtered by Jupiter’s gravitational influence.
New research on calcium-aluminum-rich inclusions in the Antarctic meteorite DOM 08006 reveals a magnetic field in the early solar system 12 times stronger than Earth's, implying magnetism helped flatten the solar nebula into a protoplanetary disk and aided planet formation alongside gravity.
New James Webb Space Telescope analysis suggests Neptune’s third-largest moon, Nereid, is likely the last remaining remnant from Neptune’s original moon system rather to a captured Kuiper Belt object, with a water-ice-rich spectrum and an unusual orbit that imply Triton’s capture disrupted Neptune’s moons and that Nereid could offer a rare window into how moons around ice giants form.
JWST data suggest Neptune’s moon Nereid may be the only intact remnant of Neptune’s primordial moon system, surviving the disruptive arrival of Triton over 4 billion years ago. Its surface composition is more like regular satellites than Kuiper Belt objects, challenging the idea that it was captured. Computer simulations indicate a roughly 25% chance that some moons could survive the Triton encounter, and further JWST observations or a future Neptune mission could confirm this scenario.
ALMA and JWST observations of interstellar comet 3I/ATLAS reveal a striking excess of heavy water, indicating it formed in a much colder environment and likely experienced limited thermal processing. This enrichment suggests its origin differs markedly from our solar system’s history, underscoring that our solar system may be unusual and pointing to rich future discoveries of interstellar material with upcoming telescopes.
Presolar grains in meteorites—older than the Sun—are helping scientists test how our solar system formed. Evidence of aluminum-26 without iron-60 argues against a simple nearby supernova trigger and favors a scenario where winds from a Wolf-Rayet star delivered aluminum-26 into the nascent solar nebula; researchers are using nanoprobe analysis of meteorite grains to confirm this, though the origin story remains under debate.
New research suggests that Jupiter's early rapid growth influenced the formation of the solar system by creating rings and gaps that led to the late formation of primitive meteorites called chondrites, and also helped shape the orbits of Earth, Venus, and Mars.
New research suggests that Uranus and Neptune may not be 'ice giants' as previously thought, but could instead be 'rocky giants' with interiors dominated by rock rather than ice, due to limited data and a wide range of possible interior compositions. This challenges existing models of solar system formation and highlights the need for dedicated missions to better understand these planets.
Scientists debate whether the gas giants or terrestrial planets formed first in our solar system, with theories including accretion and streaming instability, while determining the exact ages of planets remains challenging due to limitations in current dating methods and the difficulty of obtaining samples.
An astrophysicist explains that the interstellar object 3I/Atlas, initially thought to be alien, is a comet with unique properties such as emitting its own light and having a high carbon dioxide ice ratio, providing insights into other solar systems and their formation, with future observations expected to reveal more about its origins and composition.
Astronomers have captured the first images of a young solar system analog, HOPS-315, revealing early planet formation processes similar to our own solar system's origins, using JWST and ALMA, providing new insights into how planets and planetesimals form.
Research suggests that the impact that created the Moon also delivered significant carbonaceous material to Earth, contributing to its habitability. Simulations indicate that Theia, the impactor, likely contained a high proportion of volatile-rich carbonaceous chondrites, which may have played a crucial role in Earth's development as a life-supporting planet. The study highlights the importance of giant planet migrations, especially Jupiter's, in shaping the distribution of materials in the early Solar System and influencing Earth's composition.
A tiny mineral grain from asteroid Ryugu revealed djerfisherite, a mineral typically formed in high-temperature, oxygen-poor environments, challenging previous assumptions about Ryugu's uniform composition and suggesting complex mixing and thermal histories in the early Solar System.
Researchers analyzing samples from asteroid Ryugu discovered the mineral djerfisherite, which challenges existing ideas about the asteroid's formation and suggests complex early solar system processes, possibly involving material mixing or localized conditions.