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Latest Protoplanet Stories

New Evidence Suggests Mercury Was Formed From A Stellar Collision
2014-07-08 10:50:50

Gerard LeBlond for redOrbit.com - Your Universe Online Planet Mercury has an unusual metal-rich composition which has baffled the scientific community. However, new evidence may have solved this mystery. According to a new study published online in Nature Geoscience on July 6, Mercury along with other space objects in the solar system with an unusual metal-rich composition, may be left over from stellar hit-and-run collisions in the early formation of the solar system. The...

Computer Simulations Help Explore Origins Of Our Solar System
2013-02-15 10:00:41

Peter Suciu for redOrbit.com — Your Universe Online Understanding past collisions between celestial bodies, including asteroids, could help researchers better understand the origins of our Solar System. After all, it was through a series of such collisions some four and a half billion years ago that our planetary system was formed. What started as a giant dusty gas cloud combined to form increasingly large clumps, and as these collided and combined, they grew into what we now...

2013-02-06 09:43:42

Revising and revisiting the Giant Impact Theory Scientists are revisiting the age-old question of how Earth's moon formed with the development of two new models that work out the complicated physics of planetary collisions. The idea of a moon-forming collision is not new: The Giant Impact Theory put forth in the 1970s suggested that the moon resulted from a collision with a protoplanet approximately half the size of ancient Earth. But the physics underlying such a collision implied that...

Violent Collision Created Rare Meteorite
2012-11-16 11:32:50

April Flowers for redOrbit.com - Your Universe Online Some meteorites found on Earth contain strikingly beautiful, translucent, olive-green crystals embedded in an iron-nickel matrix. These "space gems," called pallasites, are only found in a tiny fraction of the total number of meteorites, but they have fascinated scientists since they were first identified as originating in outer space more than 200 years ago. A new study, published in the journal Science and led by John Tarduno at...

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2011-05-26 07:15:00

Scientists on Wednesday said they believed they could explain why Mars is smaller than Earth. They report in the journal Nature that Mars had a growth spurt, developing in as little as two to four million years after the birth of the Solar System, but then suddenly stopped. Earth grew to its full size over 50 to 100 million years, most likely through agglomeration as it collided with other young space rocks. "Earth was made of embryos like Mars, but Mars is a stranded planetary embryo that...

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2009-04-10 07:25:00

NASA's twin STEREO probes are entering a mysterious region of space to look for remains of an ancient planet which once orbited the Sun not far from Earth. If they find anything, it could solve a major puzzle--the origin of the Moon. "The name of the planet is Theia," says Mike Kaiser, STEREO project scientist at the Goddard Space Flight Center. "It's a hypothetical world. We've never actually seen it, but some researchers believe it existed 4.5 billion years ago"”and that it collided...

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2006-03-21 14:23:06

JAA -- In an article to be published in Astronomy & Astrophysics, two British astronomers present new numerical simulations of how planetary systems form. They find that, in the early stages of planetary formation, giant protoplanets migrate inward in lockstep into the central star. The current picture of how planetary systems form is as follows: i) dust grains coagulate to form planetesimals of up to 1 km in diameter; ii) the runaway growth of planetesimals leads to the formation of...


Word of the Day
omadhaun
  • A fool; a simpleton: a term of abuse common in Ireland and to a less extent in the Gaelic-speaking parts of Scotland.
This word is partly Irish in origin.