Tag

Ice Giants

All articles tagged with #ice giants

astronomy15 days ago•130 min saved

Uranus’s 98-degree tilt remains a mystery, with new theories pointing to a lost moon

Uranus’s extreme 98-degree axial tilt, which causes it to roll on its side rather than spin upright, remains a subject of ongoing debate among astronomers. While the exact cause is unknown, recent research suggests a collision with a hypothetical 'lost' moon in the distant past may have instigated this unique orientation. The planet, the coldest in the solar system, has at least 27 known moons that share this unusual tilt, and its discovery history dates back to William Herschel’s 1781 observations.

via Space|

#astronomy #ice-giants #planetary-formation

science1 month ago•6 min saved

Diamond Remains Diamond Under Extreme Shocks, Solving 20-Year Melting Mystery

Laser-driven shock experiments up to pressures beyond Neptune’s core show diamond melts without forming an intermediate phase, and melting temperatures now match quantum simulations—resolving a 20-year discrepancy. The results hint that slightly slower initial shocks could triple fusion energy gain in inertial confinement fusion and provide tighter constraints for modeling diamond rain in ice giants like Neptune and Uranus.

via Science Daily|

#diamond #high-pressure-physics #ice-giants

space-and-spaceflight3 months ago•16 min saved

New Model Recasts Uranus and Neptune as Magma-Ocean Giants

A UC-led study proposes Uranus and Neptune may harbor well-mixed magma oceans with dissolved hydrogen beneath a hydrogen-dominated envelope, suggesting they’re magma-ocean giants rather than ice giants and potentially explaining their densities. The model, submitted to The Astrophysical Journal, challenges the traditional three-layer interior picture and could inform the study of sub-Neptune exoplanets, though the idea remains under debate without a dedicated mission to these distant planets.

via Gizmodo|

#ice-giants #interior-structure #magma-ocean

space3 months ago•3 min saved

New Study Hints Uranus and Neptune Hide Magma Oceans, Not Ice

A UCLA-led study using computer models proposes that Uranus and Neptune may have interior magma oceans rather than icy mantles, with a layered structure of a hydrogen/helium atmosphere, a boundary layer containing H/He/Mg/SiO/O, and a bottom magma ocean of silicate and iron. This challenges the long-standing “ice giants” label and has implications for understanding similar sub-Neptune exoplanets, while noting proposed future missions (Uranus Orbiter and Probe, Neptune Odyssey) and ongoing interest in these worlds.

via Universe Today|

#exoplanets #ice-giants #magma-ocean

space4 months ago•111 min saved

Two Lost Ice Giants May Have Shaped the Early Solar System

A new study based on 122 simulations suggests the early outer solar system may have hosted two additional ice-giant planets with masses between Earth and Neptune that were later ejected. Depending on whether the system started with five or six giants, Jupiter’s moons remained stable in the presence of two extra ice giants, while Uranus’s moons stayed stable with only one extra; Miranda’s ice content hints at past moon collisions. The findings imply a far bardziej crowded infancy for the solar system than previously thought, and the team notes further simulations are needed to pin down the exact number and masses of the missing planets. The work was published online in Icarus (2026).

via Live Science|

#giant-planets #ice-giants #jupiter

space5 months ago•9 min saved

Uranus and Neptune Might Be Rockier Than Previously Believed

A new Astronomy & Astrophysics study finds Uranus and Neptune could have outer layers dominated by rock rather than ice, challenging the long-held “ice giant” label and prompting revisions to theories of solar-system formation and even exoplanet classifications.

via The Daily Galaxy|

#ice-giants #neptune #planetary-science

space5 months ago•73 min saved

Rocks in the Ice Giants? Uranus and Neptune May Be More Rocky Than Thought

A new Astronomy & Astrophysics study models Uranus and Neptune and finds their outer shells may be composed largely of rocks rather than being purely icy, implying their atmospheres could be littered with rocky material and suggesting a possible reclassification from “ice giants” to a term like “minor giants,” though the authors caution this isn’t definitive.

via Space|

#ice-giants #neptune #planet-classification

science5 months ago•5 min saved

A Quasi-1D Superionic Phase Could Lurk Inside Uranus and Neptune

Researchers using first-principles simulations predict a new quasi-1D superionic phase in a carbon–hydrogen compound that could exist inside ice giants Uranus and Neptune at extreme pressures and temperatures. In this phase, hydrogen diffuses along a carbon lattice that forms a helical structure, producing anisotropic heat and electrical conduction. This could influence our understanding of the planets’ unusual magnetic fields and guides how such materials might behave under the extreme conditions found in their interiors.

via ScienceAlert|

#carbon-hydrogen-compound #high-pressure-physics #ice-giants

science9 months ago•2 min saved

Reevaluating Uranus and Neptune: Are They Really Ice Giants?

A new computational model suggests that Uranus and Neptune may have rockier interiors than previously thought, challenging the traditional classification of these planets as 'ice giants' and potentially explaining their complex magnetic fields. The study combines physics-based and observational data to propose that their cores contain significant rock content, which could influence their magnetic properties. Further research and dedicated space missions are needed to confirm these findings.

via Live Science|

#ice-giants #neptune #planetary-magnetic-fields

science10 months ago•3 min saved

Uranus and Neptune Might Be Rock Giants Instead of Ice Worlds

New research suggests that Uranus and Neptune may be more rocky and less icy than previously thought, challenging the traditional classification of these planets as 'ice giants' and highlighting the need for future missions to better understand their true nature.

via ScienceAlert|

#ice-giants #magnetic-fields #neptune

science1 year ago•3 min saved

Uranus and Neptune Might Be Rocky Giants Instead of Ice Giants

A new study challenges the traditional view that Uranus and Neptune are 'ice giants,' suggesting they may instead have a rockier internal structure based on observational data and modeling, highlighting the need for dedicated missions to better understand these distant planets.

via IFLScience|

#ice-giants #neptune #planet-classification

science1 year ago•3 min saved

Reevaluating the Nature of Uranus and Neptune: Are They Really 'Ice Giants'?

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.

via Space|

#ice-giants #neptune #planetary-interiors

science1 year ago•3 min saved

Reevaluating the 'Ice Giant' Classification of Uranus and Neptune

A recent study suggests that Uranus and Neptune may be better classified as 'rock giants' rather than 'ice giants' due to their interior compositions being dominated by rock and water, challenging longstanding classifications and offering new insights into planetary formation.

via Universe Today|

#ice-giants #neptune #planet-formation

science1 year ago•3 min saved

The Surprising Reality of Standing on Uranus

Landing on Uranus is impossible due to its lack of a solid surface and extreme atmospheric conditions; any probe attempting to land would be crushed by high pressures and temperatures, but scientists continue to study these planets to better understand their composition and nature.

via IFLScience|

#gas-giants #ice-giants #planetary-landing

science1 year ago•6 min saved

Exploring Uranus: Insights from the KISS Workshop

NASA's proposed Uranus Orbiter and Probe (UOP) mission aims to explore Uranus and its moons, marking it as a top priority for 2023-2032. The mission seeks to enhance understanding of ice giants, focusing on Uranus' interior, atmosphere, rings, and moons. This exploration could provide transformative insights into planetary formation and evolution, potentially influencing our knowledge of exoplanets. The mission also considers the astrobiological potential of Uranus' moons, which may harbor liquid oceans beneath their surfaces.

via Space.com|

#ice-giants #nasa #planetary-science