Theia collision with early Earth formed the Moon – True
Question asked:
“Theia collided with the early Earth, forming the Moon.”
Summary
The prevailing scientific consensus is that a Mars‑sized protoplanet named Theia struck the early Earth, ejecting debris that coalesced to form the Moon. This giant‑impact scenario is supported by isotopic evidence and numerical simulations reported in recent NASA and peer‑reviewed research.
Sources 60 searched
- Collision May Have Formed the Moon in Mere Hours, Simulations Reveal - NASA
Billions of years ago, a version of our Earth that looks very different than the one we live on today was hit by an object about the size of Mars, called Theia – and out of that collision the Moon was formed.
- Moon Formation - NASA Science
A massive object ― named Theia after the mythological Greek Titan who was the mother of Selene, goddess of the Moon ― smashed into Earth, flinging material into space that became the Moon.
- The Moon-forming impactor Theia originated from the inner Solar System | Science
The debris from that giant impact formed the Moon, with material from Theia incorporated into both the Moon and Earth. Hopp et al. measured iron isotopes in lunar samples, Earth samples, and meteorites.
- Isotopic evidence for the formation of the Moon in a canonical giant impact | Nature Communications
A canonical giant impact between Theia (chondritic V isotope composition) and proto-Earth would then have produced the present-day Earth-Moon system, with ~80% of the lunar accretionary material deriving from the impactor and essentially no ...
- Zirconium isotope constraints on the composition of Theia and current Moon-forming theories - ScienceDirect
All analysed lunar samples (whole-rock, ilmenite and pyroxene separates) display identical Zr isotope compositions to that of the Earth within the uncertainty of 13 ppm for 96Zr/90Zr (2σ weighted average).
- On the origin and composition of Theia: Constraints from new models of the Giant Impact - ScienceDirect
All analysed lunar samples (whole-rock, ilmenite and pyroxene separates) display identical Zr isotope compositions to that of the Earth within the uncertainty of 13 ppm for 96Zr/90Zr (2σ weighted average).
- Moon: Origin, alternative theories Caitlin Ahrens ...
energetic Theia-type planetoids; and (iii) orbital evolution of the Earth-Moon system to lose half of its ... From Wise (1963), the fission theory provided some major points of lunar origin (at least in the 1960s), such as: (i) correctly predicting the direction of the Earth’s rotation being the same direction as the · Moon’s; (ii) explain the relatively circular orbit of the Moon around the Earth; (iii) core-settling · hypothesis predicts the observed specific gravity of the Moon; (iv) the same-facing position of the Moon
- Research Advances in the Giant Impact Hypothesis of Moon Formation | Space: Science & Technology
However, the isotopic similarities ... This contradiction led to what is now known as the “isotope crisis” in the giant impact hypothesis....
- How did the Moon form? | Natural History Museum
Capture theory suggests that the ... by Earth’s gravity as it passed nearby. The accretion hypothesis proposes that the Moon was created along with Earth at its formation....
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