Earth-Asteroid Collision Formed Moon Later Than Thought
The moon was formed from fragments of Earth after a collision with a giant asteroid relatively late in our planet's formation, new tests of moon rocks show.
Scientists have long believed that the moon was formed by a collision between our planet and a Mars-size object.
Computer models have shown that in this scenario 80 percent of the moon's material should have come from the asteroid, with only 20 percent from Earth.
But the new study of moon rocks collected three decades ago by Apollo astronauts, however, found that Earth and the rocks were too similar for that to be the case.
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The moon was formed from fragments of Earth after a collision with a giant asteroid relatively late in our planet's formation, new tests of moon rocks show.
Scientists have long believed that the moon was formed by a collision between our planet and a Mars-size object.
Computer models have shown that in this scenario 80 percent of the moon's material should have come from the asteroid, with only 20 percent from Earth.
But the new study of moon rocks collected three decades ago by Apollo astronauts, however, found that Earth and the rocks were too similar for that to be the case.
link
todo o sistema solar já foi um disco achatado de matéria em constante rotação que continha a materia toda que viria a dar origem aos planetas que hoje conhecemos o incrivel é que ainda estamos em rotação desde essa epoca mas temos vindo a abrandar e a abrandar...É fantastico.
