Indeed Two Melting Planet Earth become one?

                                                                                                                                                                                                    California - Billions of years ago, Earth formed, and according to one study, it turns blue planet was the result of two planets collided so violently.

At that time, the young Earth and a planet 'embryo' named Theia collided. So great, to form the Moon. The collision occurred at 100 billion last year. Dust and materials that form the Earth that we live last night, and the moon that we see at night.

It was concluded after studying the moon rocks brought to Earth by the astronauts of the Apollo missions. Scientists from the University of California found that their oxygen isotope together with Earth.

That is, there has been a hit among Theia and Earth is so great, that the two planets were joined together into a new planet, while bongkahannya formed the Moon, quoted by the Telegraph, Sunday (01/31/2016)

"We have trouble finding the difference between the oxygen isotope Earth and the Moon," said Edward Young, leader of the new study and a professor of writing and kosmo geochemical chemistry at UCLA.

"Theia join with the Earth and the Moon, crushed, then melted into them. This explains why the same signs of Theia, both on Earth and the Moon."                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 With Theia collision occurred about 100 million years after the Earth was formed embryo or about nearly 4.5 billion years ago.

Believed Theia collided with the Earth at an angle of 45 degrees or more, described by the author as a 'side lacing exceptional'.

Researchers analyzed seven rocks brought to Earth from the Moon by the Apollo missions 12, 15, and 17, along with six layers of volcanic rock from the earth, five from Hawaii and one from Arizona.

The key to reconstruct the great collisions is typical chemical oxygen atoms contained in the rocks. More than 99.9 percent oxygen on Earth is O-16, so called because each atom contains eight protons and eight neutrons.

However, there is also a small amount of heavier oxygen isotopes, O-17, which has one extra neutron, and O-18, which has two extra neutrons.

In 2014, a team of German scientists reported in the journal Science that the Moon also has the oxygen isotope ratios that are unique and different from the Earth. But new research finding is not the case.

Young professor's research team using the latest technology and techniques to make measurements of very careful and precise, and verify it with the latest measurement instruments atom from UCLA.

Theia were destroyed in the collision, but became part of the Earth and the Moon, will grow and become a planet if the collision did not happen, added Professor Young.

Professor Young and other scientists believe the planet is approximately equal to the size of Earth, but some are believed smaller, about the size of Mars.

The existence of collisions is expected first in 2012 by Matija Cuk, now a research scientist with the SETI Institute, and Sarah Stewart, now a lecturer at UC Davis, and separately in the same year by Robin Canup of the Southwest Research Institute.

Recent research published in the journal Science.

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