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Moon Formation

All articles tagged with #moon formation

Moon could form in just five hours after Earth-Theia collision, study suggests
space1 month ago

Moon could form in just five hours after Earth-Theia collision, study suggests

A new simulation-based study suggests the Moon could have formed in as little as five hours after the giant impact between early Earth and a Mars-sized protoplanet called Theia, depending on extreme temperatures and the material strength of both bodies. If correct, this rapid formation would rewrite timelines for lunar genesis and highlight how rock strength affects debris accretion in planetary collisions, with implications for exomoon searches and understanding other ancient impacts.

via Live Science|
#earth#giant-impact-hypothesis#moon-formation
Moon Born in a 5-Hour Flash After Giant Impact, New Study Suggests
space1 month ago

Moon Born in a 5-Hour Flash After Giant Impact, New Study Suggests

New simulations considering the internal temperatures and material strengths of early Earth and Theia suggest the Moon could form within about five hours after the Theia–Earth giant impact if Theia was relatively warm; cooler, slower-forming scenarios are also possible. This refines the leading giant-impact theory, indicating the Moon largely originated from Theia’s mantle with a bit from Earth, and implies the Moon’s volatile content and isotopic differences may reflect the thermal state at impact. The findings have implications for exomoon searches and the Moon’s formation timeline.

via space.com|
#giant-impact#isotopes#moon-formation
Earth's Moon: a cataclysmic birth that steadied tides and climate
science3 months ago

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
JWST finds Neptune’s Nereid may be the solar system’s oldest moon survivor
space4 months ago

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
Moon's Origin Remains a Puzzle as Scientists Revisit Theia Scenario
space5 months ago

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
Scientists Find Evidence of a 4.5-Billion-Year-Old Proto-Earth Inside Our Planet
science11 months ago

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
The Cosmic Collision That Made Earth Habitable and Gave Rise to Life
science1 year ago

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
Mars' Moons: Born from Asteroid Destruction?
science1 year ago

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
Small Planets with Large Moons May Be Key to Finding Life
science2 years ago

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
Scientists Confirm the Moon's Inside-Out Transformation
science2 years ago

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
"The Formation of Planet Earth: A Glimpse into its Early Days"
science2 years ago

"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