Collisions With Other Objects Helped Form Earth

Collisions With Other Objects Helped Form Earth
skeeze / Pixabay

Everyone has always wondered how the Earth is exactly in the round shape that it is and how it got to be this way. According to scientists, Earth has had a long history of collisions with other celestial objects. Later on, scientists who conducted research to try to explain why our planet is as large as it is now suggested that collisions with other celestial objects helped form Earth.

Helped Form Earth
Image source: YouTube Video Screenshot

The study has been published in the journal Nature Geoscience, and it argues that the way scientists calculated Earth’s form from that violence has its faults. According to the scientists, some kind of a chaotic event caused the moon to form. Scientists aren’t entirely sure about the way the moon formed; however, they have been working on a few theories which could prove how the moon began to orbit the Earth. According to the scientists, after the moon formed, Earth was bombarded by different celestial objects, which the scientists refer to as “planetesimals.” That’s a nickname for the building blocks of planets.

Those objects are even now found in the universe. In young solar systems, the dust lumps together to create blocks and planets. After that, they stick together and form planets. Planetesimals are quite large, as they hit roughly 600 miles across, which is larger than an asteroid.

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So far, scientists have found up to 0.5% of the mass of our planet to all the planetesimals which hit it during the days it was formed. They got this information through analyses which included elements such as metals like gold and platinum, as our planet received them from space and they are located in the mantle, the area under the Earth’s surface. Scientists say they confirmed this fall that those elements were created through collisions between neutron stars that were extremely dense. However, the scientists that conducted the research believe that model is not as accurate and that the original model underestimates the amount of those metals that sunk all the way to Earth’s core or flew back into space.

After they repeated the calculations which were based on the new estimates, the authors of the study explained that planetesimals could have had an impact of five times more of Earth’s mass, compared to the old model. The planetesimals could also explain why scientists struggled with old rock samples; they didn’t display an accurate chemical fingerprint, which further complicated the debate about the moon’s formation. The new study could solve that mystery and also explain how other objects helped form Earth.

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Danica Simic has been writing ever since she was a child. Before she started writing for ValueWalk she was reviewing laptops, headphones and gaming equipment as well as writing articles about astronomy and game development. Danica is a student of applied and computational physics while also studying software and data engineering. Her hobbies include reading, swimming, drawing and gaming whenever she has free time. - Email her at
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