Bookmark Kaumudi Online  Bookmark this site  Editor@Kaumudi  |  Marketing  Print Advt rates  |  Calendar 2012        Go!    
 
 
July 27, Thursday 2017 3:57 AM       

       HEADLINES: Power outages across State on Wednesday evening                                              Dileep encroached govt land: Report                                              I’m a victim of gossip; I’ve no accounts that need to be probed: Namitha Pramod                                              Drunk doc smashes six vehicles                                              Those who blame me today will accept me tomorrow: A K Nazeer                                              Modi congratulates Nitish after resignation                                              80 per cent of Yemen children in need of immediate aid: UN                                              Syrian civilians fleeing IS in Raqa turn to smugglers                                              US Senate votes to begin debating Obamacare repeal                                              Galle Test: Dhawan, Pujara lead India's carnage on opening day                                              It's beginning of good times for Indian women's cricket: Mithali Raj                                              This year's Ashes could be Bodyline 2, says Damien Fleming                                              Kaumudi Facebook
       SCI&TECH Next Article: China to set up world's highest altitude telescopes in Tibet  
       Moon may have formed from collision of tiny 'moonlets'
 
         Posted on :20:24:16 Jan 10, 2017
   
A A
       Last edited on:20:24:16 Jan 10, 2017
         Tags: Moon, collision of tiny 'moonlets'
 
JERUSALEM: Small 'moonlets' may have collided to form the Moon as we see it today, according to a new study which contradicts the prevalent theory that our natural satellite resulted from a giant impact between a small Mars-like planet and the ancient Earth. The study also claims that the Moon we see now is not Earth's first moon, but rather the last in a series of moons that orbited our planet.
 
The newly proposed theory by researchers at the Technion – Israel Institute of Technology and Weizmann Institute of Science in Israel counter to the commonly held "giant impact" paradigm that the moon is a single object that was formed following a single giant collision between a small Mars-like planet and the Earth. "Our model suggests that the ancient Earth once hosted a series of moons, each one formed from a different collision with the proto-Earth," said Hagai Perets from the Technion.
 
"It is likely that such moonlets were later ejected, or collided with Earth or with each other to form bigger moons," said Perets. To check the conditions for the formation of such mini-moons or moonlets the researchers ran 800 simulations of impacts with Earth. The new model is consistent with science's current understanding of the formation of Earth.
 
In its last stages of the growth, Earth experienced many giant impacts with other bodies. Each of these impacts contributed more material to the proto-Earth, until it reached its current size. "We believe Earth had many previous moons, a previously formed moon could therefore already exist when another moon-forming giant impact occurs," said Perets.
 
The tidal forces from Earth could cause moons to slowly migrate outwards - the current Moon is slowly doing that at a pace of about one centimetre a year. A pre-existing moon would slowly move out by the time another moon forms. However, their mutual gravitational attraction would eventually cause the moons to affect each other and change their orbits.
 
"It is likely that small moons formed through the process could cross orbits, collide and merge," said lead author Raluca Rufo from Weizmann. "A long series of such moon-moon collisions could gradually build-up a bigger moon - the Moon we see today," said Rufo. The study was published in the journal Nature Geoscience.
 
A A
       SCI&TECH
Next Article: China to set up world's highest altitude telescopes in Tibet
 
 
SCI&TECH HEADLINES
Orbiting supermassive black holes discovered for first time  
Theweightmonitor.com launches mobile app for easier access to one-stop weight management platform  
New drug to treat blood cancer developed  
Threat of asteroid impact looming over Earth: experts  
Hottest known planet in universe discovered  
Wireless, battery-less pacemaker developed  
'Manned missions to Moon, Mars may face medical emergencies'  
Ransomware threat: Centre activates mechanism to prevent ‘Wannacry’ cyber attack  
2 lakh hit by 'unprecedented' cyberhack in 150 nations:Europol  
foodpanda revamps mobile app; provides more options  
ixigo launches trains app for Apple iOS users  
Virtual humans may help doctors learn empathy: study  
Gamers, here are five games to watch out for  
Yahoo India homepage gets brand new look  
Spacecraft flies between Saturn and rings in historic 1st  
Google targets 'fake news,' offensive search suggestions  
Offensive WhatsApp posts can land group admin in jail  
Facebook for 'everyone' and not just high end: Zuckerberg  
Google Earth re-invented for new era  
NASA images show how India looks from space at night  
Signs of life detected below world's deepest point  
'iPhones assembly in Bengaluru by Apple in less than a month'  
Five astronauts assigned to future ISS mission: NASA  
Trump plans to send humans to Mars  
First patient cured of rare blood disorder'  
 
Do you support Nitish Kumar's resignation as Bihar CM?
yes
 
no
 
don't know
 
 
 
Home Kerala India World Business Sports Sci&Tech Education Automobile CityNews Movies Environment Letters 
© Copyright keralakaumudi Online 2011  |  Reproduction in whole or in part without written permission is prohibited.
Head Office Address: Kaumudi Buildings, Pettah P.O, Trivandrum - 695024, India.
Online queries talk to Deepu Sasidharan, + 91 98472 38959 or Email deepu[at]kaumudi.com
Customer Service -Advertisement Disclaimer Statement   |  Copyright Policy