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Antarctica Yields Fragments of an Ancient Destroyed Planet -A Galaxy Insight

Antarctica_2 Rocks can be many things: they were probably our earliest weapons, they've been ballast on our journeys of exploration, even modern-art pieces.  But a pair recovered from Antarctica may be the grandest application yet - tombstones for an entire world.  Lunar and Planetary Institute researcher Allain Treiman believes that them to be pieces of a destroyed dwarf planet, relics from the creation of the solar system.

300pxcharon_2_4 It's relevant to questions so important that most adults don't think to ask them - why are there only eight planets?  Or nine, or however many there are now?  Why are they where they are?  Because of all the objects that formed during the birth of the solar system, the ones we see are the ones that survived.  It's likely that many small proto-planets formed as the stellar dusts condensed into larger bodies - some collided and merged, some may have been pinballed out of the system by the varying gravitational fields, and it seems that some got smashed to bits in the confusion.  The existence of the asteroid belt supports such planetary pile-ups - but we can look at these antarctic rocks much closer.

Mineral analysis of the fragments reveals a large concentration of feldspar - large enough to have needed a planet to create it.  You might not think of rocks as hot and runny (unless you're the Human Torch), but when you gather enough of anything together the pressure and heat provided by gravity will melt it.  Materials of different densities float to different heights (just like oil in water), and as the system cools these differentiated layers are frozen in.  If you hang around for a while you have a hard shell around a layered liquid core, like our own Earth, and eventually the entire system solidifies, like the Moon.  If you lose a fight with another extremely solid body you get blown to pieces - but each of those pieces still shows evidence of the layer-cake structure.

It'll take more than a royal cavalry regiment to put this proto-planetary Humpty Dumpty together again.  It's thought that many of the pieces could be in the asteroid belt between and Jupiter, while others may have impacted on other planets or even been burned up in the Sun.  Spectral analysis of asteroids may confirm this hypothesis, but it seems clear that the early solar system was a dangerous place - and we have one more "We were lucky there" coincidence to thank for life as we know it.

Posted by Luke McKinney.

Related Galaxy posts:

Antarctica's "Relic Landscape" Preserved for Milllions of Years Yields Secrets of Earth's Interior
World's Oldest Living Microbes May Cast Light on Aging & Life on Mars
Ancient Antarctic Microbes Revived in Lab

Antarctica -Mapping The White Continent

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Rocks recovered from Antarctica


Antarctica seems like a gold mine for interplanetary relics. I think it would be SPLENDID to find a fossil in one of them, but maybe that's expecting TOO much.

* BBC: Dwarf planet 'becoming a comet'- An unusual dwarf planet discovered in the outer Solar System could be en route to becoming the brightest comet ever known... 2003 EL61... Professor Mike Brown has calculated that the object could be due a close encounter with the planet Neptune.
If so, Neptune's gravity could catapult it into the inner Solar System as a short-period comet... Some time early in its history, it was smacked, edge on, by another large KBO (Kuiper Belt Objects)...
* One of Nibiru's satellites cut Tiamat in two, thus forming the "Sky", the Asteroid Belt ... and the other half formed the Earth... a planet moving very fast, on a elliptical orbit, similar to a comet. (Zecharia Sitchin, The Twelfth Planet)... Details:

Noticed recent posts omit the word "Mars" in a few places - again it happens in last paragraph above. Is there a bug in system? Interesting well written post, by the way, thanks for your efforts.

maybe this can be fragments of the legendary planet Nibiru or Planet X, this planet allegedly exist between Mars and Jupiter that explode so many centuries ago, the history tell that beings lived in that planet put us in here.

if those fragments are planets' parts.. then there's millions and millions of options where they could be...
melting planets on one needs time, hit and presure!!
All perfectly balanced to have life..

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