Tag

Planetary Evolution

All articles tagged with #planetary evolution

science10 days ago•120 min saved

Coldest Known Lava World, HD 3167 b, Defies Expectations by Retaining an Atmosphere

Astronomers have identified HD 3167 b, a rocky super-Earth located 154 light-years away, as the coldest known lava world with evidence of an atmosphere. Despite orbiting its host star in just one Earth day, the planet retains an atmosphere, defying expectations that such close proximity would strip away gases. This discovery, published in The Astrophysical Journal Letters, provides a critical data point for understanding the temperature threshold at which rocky planets lose their atmospheres and offers insights into the early, molten stages of Earth's formation.

via Space|

#atmospheric-science #exoplanets #james-webb-space-telescope

science10 days ago•212 min saved

Orbital Data Confirms Ancient Lunar Dynamo via Buried Volcanic Complex

A new study confirms the Moon possessed a magnetic field 4.2 billion years ago by analyzing a buried volcanic complex on its far side. Researchers combined gravity and magnetic data from orbital probes to identify a dense, magnetized rock body, resolving a long-standing debate about the lunar dynamo.

via CNN|

#geophysics #lunar-science #magnetism

science27 days ago•3 min saved

Mercury Shrinks 30% Faster Than Scientists Thought

A new study using data from NASA’s MESSENGER mission finds Mercury is contracting about 14 miles over 4.5 billion years, at roughly 30% faster rate than previously believed, helping scientists glimpse the planet’s interior and its cooling history.

via nypost.com|

#geophysical-research-letters #mercury #messenger

space3 months ago•8 min saved

JWST Discovers a Planet’s ‘Second Life’ Around a White Dwarf

Using JWST, scientists observed WD 1856b, a giant planet about 82 light-years away that orbits a white dwarf, finding its atmosphere and surprisingly high temperature (~126 C) and mass (~7 Jupiter masses). The system features the deepest known exoplanet transit (56%), and the results suggest a “second life” for giant planets after their star dies—potentially heated by a nearby binary—and open a new field of post-main-sequence planetary atmospheres, while the idea of a rocky planet in a white-dwarf habitable zone remains speculative.

via ScienceAlert|

#exoplanet #jwst #planetary-atmospheres

science9 months ago•5 min saved

Ancient African Bedrock Unveils Earth's Violent Origins

The article explores how ancient rocks in South Africa reveal Earth's early history, showing a planet with extensive oceans, volcanic activity, and microbial life over 3 billion years ago, highlighting the violent yet life-sustaining beginnings of our blue planet.

via The Conversation|

#early-life #earths-ancient-rocks #oceanic-world

science9 months ago•2 min saved

Moon's Drift Away from Earth and Its Future Impact

The Moon is gradually drifting away from Earth at about 3.8 centimeters per year, a process driven by tidal interactions that have influenced Earth's rotation and the Moon's orbit over billions of years. This slow migration will eventually lead to a longer day length and possibly a tidal lock, with profound implications for Earth's future and the solar system's stability, especially as the Sun ages.

via The Daily Galaxy|

#earth #future-predictions #moon

science9 months ago•4 min saved

Earth's Atmosphere May Make the Moon More Habitable Than Previously Thought

Research shows Earth's atmospheric particles have been traveling to the moon for billions of years via magnetic field lines, potentially creating a long-term record of Earth's atmospheric history on the lunar surface and offering resources for future lunar bases.

via Space|

#earth-atmosphere #magnetic-field #moon

science10 months ago•3 min saved

New Insights into Planetary Tectonics and Habitability

Scientists have identified a new tectonic regime called the 'episodic-squishy lid' that could explain how planets like Earth and Venus evolve differently, impacting their habitability. This regime describes a planet's outer shell cycling between quiet and active phases, which may have played a role in Earth's development of plate tectonics and could help identify potentially habitable exoplanets. The findings, published in Nature Communications, offer new insights into planetary geology and the conditions that support life.

via Space|

#earth #habitability #planetary-evolution

science1 year ago•6 min saved

NASA Confirms Mars Has an Earth-Like Solid Core

Scientists have discovered that Mars has a solid inner core enclosed by a liquid outer core, similar to Earth's internal structure, which provides new insights into the planet's geological history and past magnetic field, helping to explain its evolution and loss of atmosphere.

via SciTechDaily|

#inner-core #mars #nasa-insight

science1 year ago•5 min saved

NASA's Mars Insights Confirm a Solid Inner Core

NASA's InSight mission has discovered that Mars has a solid inner core about 600 km across, contrary to previous beliefs that it was entirely soft, providing new insights into the planet's internal structure and evolution.

via ScienceAlert|

#inner-core #mars #nasa-insight

science1 year ago•4 min saved

Lava Planets: Unlocking Secrets of Exoplanetary Fire and Earth's Past

Astronomers are studying lava planets—hot, rocky exoplanets with surface magma oceans—using models and upcoming observations from the James Webb Space Telescope to understand their formation, evolution, and atmospheric composition, revealing insights into their internal dynamics and age.

via Space|

#exoplanets #geophysical-modeling #james-webb-space-telescope

science1 year ago•3 min saved

NASA Predicts Early Oxygen Loss and End of Life Date for Earth

New research indicates Earth's oxygen-rich atmosphere may collapse within the next billion years, with initial signs of decline possibly starting as soon as 10,000 years from now, driven by the Sun's increasing luminosity and resulting climate changes, which could make Earth inhospitable for complex life and revert it to a microbial-dominated world.

via Indian Defence Review|

#climate-change #earth #nasa

science1 year ago•3 min saved

Unveiling the Secrets of Lava Planets and Their Implications for Earth's Fiery History

A new study introduces a framework for understanding lava planets, extreme rocky worlds with molten surfaces, by examining their internal chemistry and atmospheric interactions. The James Webb Space Telescope will test these models by analyzing their atmospheres, potentially revealing their internal states and advancing our knowledge of planetary evolution.

via The Daily Galaxy|

#chemical-distillation #exoplanets #james-webb-space-telescope

science1 year ago•2 min saved

Scientists Discover a Metal-Poor Mini-Neptune with a Hot Interior

Astronomers using the James Webb Space Telescope have discovered a young exoplanet, V1298 Tau b, that may evolve into either a gas-rich mini-Neptune or a dense rocky super-Earth, providing insights into planetary formation and atmospheric changes during early development stages.

via The Daily Galaxy|

#atmospheric-composition #exoplanet #jwst

science1 year ago•3 min saved

Scientists Unveil New Simulation of Earth's 4.5 Billion Year History

Scientists used a new computer simulation called the Bambari model to recreate Earth's early molten state 4.5 billion years ago, revealing how layered structures and chemical patterns formed, which influence today's mantle features and volcanic activity, and providing insights into the evolution of other planets.

via The Daily Galaxy|

#early-earths-chemistry #earths-formation #mantle-dynamics