Tag

Moon Formation

All articles tagged with #moon formation

science18 days ago•11 min saved

Earth's Moon: a cataclysmic birth that steadied tides and climate

Scientists favor the giant-impact model: about 4.5 billion years ago a Mars-sized body named Theia struck early Earth, flinging molten debris that coalesced into the Moon. Lunar rocks show Earth-like isotopes, challenging simple versions of the collision and prompting models where both bodies mixed thoroughly. The Moon’s gravity drives tides and helps stabilize Earth's axial tilt, aiding a climate conducive to life, though some simulations allow tilt stability without the Moon. Artemis missions aim to bring back new lunar samples to help settle remaining questions.

via Space Daily|

#artemis #giant-impact #lunar-isotopes

space1 month ago•59 min saved

JWST finds Neptune’s Nereid may be the solar system’s oldest moon survivor

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.

via Live Science|

#james-webb-space-telescope #moon-formation #neptune

space2 months ago•8 min saved

Moon's Origin Remains a Puzzle as Scientists Revisit Theia Scenario

Scientists still don’t fully know how the Moon formed after a giant impact with Theia about 4.51 billion years ago; estimates of Theia’s size range from Mercury-sized to roughly half Earth’s mass, and while newer hydrodynamic models that favor a larger impact can explain why Moon rocks resemble Earth's chemically, Apollo samples like the Genesis Rock complicate the picture. Researchers also study lunar magma ocean conditions in the lab to probe mineral formation, but the exact origin remains unresolved.

via ScienceAlert|

#apollo-rocks #earth-moon-chemistry #genesis-rock

science8 months ago•3 min saved

Ancient Australian Rocks Offer Clues to Earth's Pre-Moon Formation Era

Scientists analyzing 3.7-billion-year-old rocks from Western Australia found chemical signatures supporting the giant impact theory of the moon's formation, revealing insights into Earth's early crust and its connection to lunar origins.

via Space|

#ancient-rocks #earths-crust #impact-hypothesis

science8 months ago•5 min saved

Scientists Find Evidence of a 4.5-Billion-Year-Old Proto-Earth Inside Our Planet

Scientists have found the first direct evidence of the proto-Earth, the original Earth before the Moon-forming impact, by analyzing ancient rocks and meteorites for potassium-40 isotopic signatures. These findings suggest that some ancient Earth materials have survived billions of years, providing new insights into Earth's early composition and the materials that formed it.

via Universe Today|

#earths-history #giant-impact #moon-formation

science9 months ago•4 min saved

The Cosmic Collision That Made Earth Habitable and Gave Rise to Life

Recent research indicates that Earth formed quickly within three million years of the Solar System's birth, but was initially dry, lacking water and carbon compounds. The planet's volatile content was likely delivered later through impacts, such as the collision with Theia, which also led to the formation of the Moon. This late delivery of volatiles was crucial for making Earth habitable, highlighting the importance of impact history in planetary habitability.

via Earth.com|

#early-earth-chemistry #earth-formation #moon-formation

science9 months ago•7 min saved

James Webb Telescope Reveals Insights into Moon Formation Around Exoplanets

The James Webb Space Telescope has for the first time analyzed the composition of a moon-forming disk around the planetary body CT Cha b, revealing a rich presence of carbon-bearing molecules that are essential for moon formation, providing new insights into how moons in our solar system and beyond may develop.

via Space|

#carbon-molecules #ct-cha-b #james-webb-space-telescope

science9 months ago•4 min saved

Webb Telescope Unveils Moon-Forming Disks Around Exoplanets

NASA's James Webb Space Telescope has directly observed a potential moon-forming disk around the exoplanet CT Cha b, revealing complex carbon-rich chemistry and providing new insights into planet and moon formation processes, with implications for understanding our solar system's origins.

via NASA Science (.gov)|

#circumplanetary-disk #exoplanet #moon-formation

science1 year ago•4 min saved

Mars' Moons: Born from Asteroid Destruction?

New computer simulations suggest that Mars' moons, Phobos and Deimos, may have formed from debris when a large asteroid was torn apart by Mars' gravity. This model explains their circular orbits and differing distances from Mars, challenging previous theories of their origin. The hypothesis will be tested by the upcoming Martian Moons eXploration mission, which aims to return samples from Phobos to Earth for analysis.

via Space.com|

#asteroid #deimos #mars

science2 years ago•4 min saved

Small Planets with Large Moons May Be Key to Finding Life

New simulations suggest that smaller rocky planets are more likely to host large moons due to less energetic collisions that produce silicate-rich disks, which are more conducive to moon formation. This contrasts with larger planets, where more energetic impacts create vapor-rich disks that hinder moon formation. The findings imply that exomoons are more likely to be found around planets less than 1.6 times the size of Earth.

via Space.com|

#exomoons #moon-formation #planetary-science

science2 years ago•2 min saved

Scientists Confirm the Moon's Inside-Out Transformation

Scientists have proposed a new theory explaining the unusual composition of Moon rocks, suggesting that heavy minerals like ilmenite initially sank to the Moon's core before rising back to the surface, effectively turning the Moon inside out. This theory, supported by data and models, challenges previous assumptions about the Moon's formation and could provide a new understanding of our celestial neighbor for future lunar exploration missions.

via Futurism|

#lunar-rocks #moon #moon-formation

science2 years ago•16 min saved

"The Formation of Planet Earth: A Glimpse into its Early Days"

Over 4.5 billion years ago, the formation of planet Earth began as a result of the collapse of a large gas cloud in the Milky Way, leading to the birth of the Sun and the formation of a planetary system. Protoplanetary disks around young stars are the starting points for planet formation, with gaps forming after 1-2 million years. Planets grow from imperfections in these disks, and collisions between protoplanetesimals lead to the formation of moons. The Moon's origin is likely the result of a high-energy collision with a foreign object, forming a synestia, and eventually settling to form Earth and the Moon as we know them today. The early Solar System was conducive to life, with the raw ingredients for habitability, suggesting the possibility of life arising elsewhere in the Milky Way.

via Big Think|

#giant-impact-hypothesis #moon-formation #planet-formation

science-and-astronomy2 years ago•7 min saved

"Unraveling the Enigma: The Absence of Gas Moons in Space"

Gas moons do exist, but they are not found in our solar system. While most moons in our solar system formed through the bottom-up core accretion process, there was not enough leftover material to form gas moons. The top-down process of gas world formation also has limitations, as objects smaller than 3 Jupiter masses cannot form. However, there are oddities in the solar system, such as captured moons, that formed independently and later got caught by a planet's gravity. In the case of exoplanets, there are two possible gas exomoons, Kepler 1625b-i and Kepler 1708b-i, which are gas giants orbiting even larger gas giants. These exomoons challenge existing theories and may have been captured objects rather than true moons.

via Space.com|

#exoplanets #gas-giants #gas-moons

science2 years ago•6 min saved

Unraveling the Enigma: Exploring the Origins of the Moon

Scientists have proposed four leading theories on how the moon formed. The capture theory suggests that the moon was wandering through the universe and was captured into Earth's orbit. However, this theory is unlikely due to the moon's size. The accretion hypothesis suggests that the moon and Earth emerged from the same cosmic cloud of dust. Another theory suggests that the moon is material shed by the Earth as it started spinning. The most widely accepted theory is the giant impact theory, which suggests that a Mars-sized planet called Theia collided with Earth, causing material to be ejected into space and eventually forming the moon. However, there are still unanswered questions and ongoing research to reconcile the finer details of this theory.

via Business Insider|

#accretion-hypothesis #capture-theory #giant-impact-theory

science2 years ago•3 min saved

Uncovering Evidence of a Collision with Another Planet Inside Earth

Scientists have discovered two large, dense masses in the Earth's mantle, one under Africa and the other under the South Pacific Ocean, which they believe could be remnants of a collision between Earth and a Mars-sized object called Theia that occurred over 4.46 billion years ago. Computer simulations suggest that most of Theia was absorbed into Earth, forming the two masses, while the remaining pieces formed the moon. If confirmed, this would provide evidence of the moon-forming crash and shed light on the evolution of Earth and other rocky planets.

via VOA Learning English|

#earths-mantle #geophysics #moon-formation