This Theia Mantle Material (TMM) would have been 0.017 to 0.026 of Earth’s mass, according to geodynamcist Qian Yuan. The impact could have created our magnetic field, increased our planet’s ...

Seismic imaging has uncovered two immense regions in Earth’s mantle that challenge our understanding of its composition and ...

It's believed that when the Earth was young, "something big," about the size of the planet Mars, known as "Theia," hit it, according to NASA. The impact was so massive that it threw our planet off ...

Since the 1980s, experts have assumed that our lunar satellite was formed in the aftermath of an explosive impact with the protoplanet Theia early in Earth's history. But now, a study suggests ...

In this image, the proposed hit-and-run collision is simulated in 3D, shown about an hour after impact. A cut-away view shows the iron cores. Theia (or most of it) barely escapes, so a follow-on ...

These simulations corroborate the hypothesis that materials from Theia were introduced into Earth's lower mantle during the impact event. Ongoing debates persist among scientists regarding the ...

Other scientists propose that after the impact all of the oxygen was able to move around in the hot vapor surrounding the Earth and moon, mixing up all the different oxygen isotopes and erasing any ...

The giant-impact theory proposes that a Mars-sized planet, now called Theia, crashed into Earth, with the resulting debris from this impact collecting in an orbit around Earth to form the moon.

Caption MFM simulation of the canonical Moon-Forming giant impact. Here different colors trace different components of Gaia and Theia. The lower mantle of Gaia, denoted by the dashed circle with a ...

The dominant idea since the 1980s was a massive impact with a protoplanet named Theia, which purportedly collided with Earth, ejecting debris that coalesced to form the moon. While plausible ...

called Theia. But now Jacob Kegerreis at Durham University’s Institute for Computational Cosmology and his colleagues have used the most detailed supercomputer simulations yet to model impact ...