You Need to Know, Earth has Two Months

Earth once had two months. According to astronomers, the moon is crashing into the other smaller, so that in the months that have now seen a sort of "second-hand drawing a big splash."

Astronomers are trying to get this to explain why the moon's far side is much more hilly than the one that always faces Earth.

This theory, described in the journal Nature, is equipped with a computer model that shows how it might happen and illustrations depicting the moon as "a pie in his face".


Outside experts said the idea is plausible, but they do not fully recognize this theory.

According to Erik Asphaug, an astronomer at the University of California, Santa Cruz, said two months and happens on earth about 4.4 billion years ago, long before there was life on earth. The moons themselves are young, formed about 100 million years ago when a giant planet hit the Earth. They both orbit the earth, in the same orbit, one in front, one behind.

The smaller is a minor planet. The other is three times larger and 25 times heavier, gravity is so strong that the smaller can not refuse, even though it is further away.

"They then collide. Big spark (which now exist) is the result of a low-speed collision," said study co-author Asphaug.

What Asphaug refer to as 'low-speed accident' is a collision at a speed of 5,000 miles per hour. But for the size of the space is quite slow, because not to cause rocks to melt.

The stones and the crust of the moon a smaller spread over and around the moon bigger without making the crater, as if the collision occurs at high speed.

Jutzi Martin of the University of Bern in Switzerland, said the study was an attempt to explain the odd crust and mountains of the far side. Asphaug see it looks as though something has been added to the surface.

Earth has always been an eccentric in the solar system as the only planet with a single month. While Venus and Mercury has no moon, Mars has two, while Saturn and Jupiter have each more than 60. Even tiny Pluto, which is now considered not a planet, has four months.

This theory is also expressed in a conference of scientists who worked on NASA robotic missions to the moon, says Jay Melosh of Purdue University.

"We could not find anything wrong with it," says Melosh. "This may be true or may not be true."

Alan Stern, a former NASA administrator said it was "just a very clever idea," but also not easy to test whether it is right.


Source: republika

Posted in: Mystery Of The World