New clues about how Earth got the moon
January 29, 2016 - Supermoon
(CNN) — It’s a usually universe besides Earth that male has set feet on. But we still don’t know accurately how it got there.
Now, rocks brought behind by a Apollo astronauts in a late ’60s and early ’70s are providing new clues about how Earth got a moon.
Many scientists have prolonged theorized that a moon shaped after a world called Theia crashed into Earth about 4.5 billion years ago.
A UCLA-led investigate group compared Earth rocks and moon rocks and dynamic a pile-up was a head-on collision, not a glancing blow as progressing theories stated.
“The moon was shaped by a violent, head-on collision between a early Earth and a ‘planetary embryo’ called Theia approximately 100 million years after a Earth formed,” a group pronounced in on UCLA’s website.
The group reported a new investigate in a biography Science.
The researchers analyzed 7 moon rocks brought behind to a Earth by a Apollo 12, 15 and 17 astronauts. They compared them with 6 volcanic rocks from Earth, 5 from Hawaii and one from Arizona.
They found a oxygen in all a rocks had a identical chemical signature.
“We don’t see any disproportion between a Earth’s and a moon’s oxygen isotopes; they’re indistinguishable,” pronounced Edward Young, a study’s lead author.
Young pronounced that if Earth had usually perceived a glancing blow, many of a moon would have been done adult of Theia, and a Earth and moon rocks would not be so similar.
So what happened to Theia? Scientists contend it didn’t tarry a collision, solely for some pieces that got churned in with a Earth and moon. If it hadn’t crashed with Earth, it competence have turn a bone-fide planet, Young said.
But afterwards Earth wouldn’t have a moon. That would meant no pleasing moonlit nights, fewer songs and most opposite continue for us Earthlings. The moon gets credit for moderating Earth’s stagger and stabilizing a climate.