Skip to comments.Long-Destroyed Fifth Planet May Have Caused Lunar Cataclysm, Researchers Say
Posted on 03/25/2002 2:42:10 PM PST by vannrox
Asteroid Vesta: The 10th Planet? Discovery Brightens Odds of Finding Another Pluto Nemesis: The Million Dollar Question HOUSTON, TEXAS -- Our solar system may have had a fifth terrestrial planet, one that was swallowed up by the Sun. But before it was destroyed, the now missing-in-action world made a mess of things. The temporary existence of more than 4 planet-sized bodies in the inner Solar System is consistent with the currently favored model for the formation of the Moon. Work by Chambers and Lissauer also supports the view that our Moon is a leftover of a massive collision between Earth and a Mars-sized body 50 million to 100 million years after the formation of the Solar System. Wendell Mendell, a planetary scientist here at NASA's Johnson Space Center, said the new theory is intriguing. "By thinking that the Solar System was really quite different in a major way with an extra inner planet, we might be able to develop some sort of self-consistent scenario that explains a lot of things. But all this is at the very early stages now," Mendell said. "You're going to have to be very, very specific on what sites you go to collect new samples," Schmitt told SPACE.com. "It may be very difficult to get an answer without using missions to fairly large impact craters that penetrate through the ejecta. Those impacts are sort of a drill hole into the lunar crust," he said.
Space scientists John Chambers and Jack Lissauer of NASA's Ames Research Center hypothesize that along with Mercury, Venus, Earth, and Mars -- the terrestrial, rocky planets -- there was a fifth terrestrial world, likely just outside of Mars's orbit and before the inner asteroid belt.
Moreover, Planet V was a troublemaker.
The computer modeling findings of Chambers and Lissauer were presented during the 33rd Lunar and Planetary Science Conference, held here March 11-15, and sponsored by NASA and the Lunar and Planetary Institute.
It is commonly believed that during the formative years of our solar system, between 3.8 billion and 4 billion years ago, the Moon and Earth took a pounding from space debris. However, there is an on-going debate as to whether or not the bruising impacts tailed off 3.8 billion year ago or if there was a sudden increase - a "spike" -- in the impact rate around 3.9 billion years ago, with quiet periods before and afterwards?
This epoch of time is tagged as the "lunar cataclysm" - also a wakeup call on the cosmological clock when the first evidence of life is believed to have appeared on Earth.
The great cover-up
Having a swarm of objects clobbering the Moon in a narrow point of time would have resurfaced most of our celestial next door neighbor, covering up its early history. Being that the Moon is so small, Earth would have been on the receiving end of any destructive deluge too.
Moon-walking astronauts brought back a cache of lunar material. Later analysis showed that virtually all impact rocks in the "Apollo collection" sported nearly the same age, 3.9 billion years, and none were older. But some scientists claim that these samples were "biased", as they came from a small area of the Moon, and are the result of a localized pummeling, not some lunar big bang.
There is a problem in having a "spike" in the lunar cratering rate.
That scenario is tough to devise. Things should have been settling down, according to solar system creation experts. Having chunks of stuff come zipping along some hundreds of millions of years later out of nowhere and create a lunar late heavy bombardment is a puzzler.
If real, what were these bodies, and where were they before they scuffed up the Moon big time? The answer, according to Chambers and Lissauer, might be tied to the the Planet V hypothesis.
"The extra planet formed on a low-eccentricity orbit that was long-lived, but unstable," Chambers reported. About 3.9 billion years ago, Planet V was perturbed by gravitational interactions with the other inner planets. It was tossed onto a highly eccentric orbit that crossed the inner asteroid belt, a reservoir of material much larger than it is today.
Planet V's close encounters with the inner belt of asteroids stirred up a large fraction of those bodies, scattering them about. The perturbed asteroids evolved into Mars crossing orbits, and temporarily enhanced the population of bodies on Earth-crossing orbits, and also increased the lunar impact rate.
After doing its destabilizing deeds, Planet V was lost too, most likely spinning into the Sun, the NASA team reported.
"This idea and others within the last few years show that the Solar System is filled with all sorts of gravitational resonances...that a lot of potential orbits in the Solar System are chaotic and unstable," Mendell told SPACE.com. "My sense is that this is a new idea. It's another thing to throw into the pot that's not totally crazy."
The work suggests there's a match up in timing, Mendell said, with asteroids striking the Moon and causing the effects that are seen in the dating of Apollo lunar rocks.
"We're moving into a really new regime," Mendell added, "where the Solar System is not a static dynamic place from day one to now. It really might have had some nuances and synchronicities associated with it that we have not really tried to exploit before."
It takes a drill hole Setting the early Solar System and lunar history record straight means going back to the Moon.
"The Moon is still the keystone to our understanding of the Solar System," NASA's Mendell said.
That too is the view of Apollo 17 astronaut, Harrison "Jack" Schmitt. Getting back to the Moon to sort out the real story is a must, he said.
Places on the Moon where older, large basins have deposited ejecta are ideal research zones, Schmitt said. Digging into such sites could yield impact glass formed by basins perhaps dating older than 3.9 billion years old, he said.
Just taking spot samples -- say from the Moon's South Pole Aitken basin -- could be risky, in terms of uncovering the Moon's rocky history, Schmitt said. Such a huge area would take multiple robotic or human exploration missions, each with significant roving abilities.
Also known as the "Big Backside Basin," Aitken is the largest impact crater on the Moon, and one of the biggest in the Solar System.
For the near term, sets of low-cost, mini-robotic landers carrying specialized gear would be ideal in opening up the Moon to further exploration, Schmitt said.
"Numbers of targeted missions could get a lot of great information on some of these fundamental questions that we still haven't been able to answer," Schmitt said.
Getting back to the Moon with a settlement for resource exploitation is another step forward. From such a site, human explorers can survey various lunar locales - even the Moon's side that we Earthlings never see, Schmitt said. "Then we can do the kind of thing that Apollo did for the near side of the Moon," he said.
Asteroid Vesta: The 10th Planet?
Discovery Brightens Odds of Finding Another Pluto
Nemesis: The Million Dollar Question
HOUSTON, TEXAS -- Our solar system may have had a fifth terrestrial planet, one that was swallowed up by the Sun. But before it was destroyed, the now missing-in-action world made a mess of things.
The temporary existence of more than 4 planet-sized bodies in the inner Solar System is consistent with the currently favored model for the formation of the Moon. Work by Chambers and Lissauer also supports the view that our Moon is a leftover of a massive collision between Earth and a Mars-sized body 50 million to 100 million years after the formation of the Solar System.
Wendell Mendell, a planetary scientist here at NASA's Johnson Space Center, said the new theory is intriguing.
"By thinking that the Solar System was really quite different in a major way with an extra inner planet, we might be able to develop some sort of self-consistent scenario that explains a lot of things. But all this is at the very early stages now," Mendell said.
"You're going to have to be very, very specific on what sites you go to collect new samples," Schmitt told SPACE.com. "It may be very difficult to get an answer without using missions to fairly large impact craters that penetrate through the ejecta. Those impacts are sort of a drill hole into the lunar crust," he said.
TVF still insists the "Face on Mars" is an artifact. It is an artifact, but only an artifact of the low resolution of the Viking orbiter cameras. It's a natural formation. Still an interesting book for the Exploding Planet Hypothesis (EPH). Since the first edition, TVF has revised the EPH to include an earlier EP to account for the KT impact and extinction.
and New Comets:
by Tom Van Flandern
It was a troll planet, and the Viking Kitties zotted it.
Oppenheimer, Einstein's boss at Princeton, thought Einstein was a crackpot. Except for 1905, it might be so viewed. Maybe including 1905.
I don't know where the planet went, boss. It looks like it just exploded like a frog.
The Exploded Planet Hypothesis 2000
Evidence that Mars is a former moon
"Especially significant in this regard is the fact that half of Mars is saturated with craters, and half is only sparsely cratered. Moreover, the crustal thickness has apparently been augmented over one hemisphere by up to 20 km or so, gradually tapering off near the hemisphere boundaries. This 'crustal dichotomy' is also readily seen in Martian elevation maps"
Red Planet's Ancient Equator Located
Scientific American (online) | April 20, 2005 | Sarah Graham
Posted on 04/24/2005 8:18:25 PM PDT by SunkenCiv
This sounds like the plot of a book I read years ago called "Inherit the Stars" by James Hogan. In it astronauts find a body on the Moon in a space suit that is totally foreign. This launches an investigation which reveals that the body is millions of years old and was left there by the inhabitants of this 5th planet who were on the Moon of the 5th planet when the planet was destroyed. The moon then floated through space until it was captured by Earth's gravity. The survivors then went down to Earth to become our ancestors. Great Book and the first of a series.
There are only a few Moon rocks available. They've been dated by using lead and tungsten decays. (These two measurements agree.)
I have seen the device that destroyed that planet, it eats planets, smashing them to rubble, digesting them for fuel:
Of course, now the Moon is 4,530,000,003 years old.
And it was built by Halliburton. It's all Bush's fault. ;)
just a bttt, with a handy link of interest:
Thanks for the ping, the links are brilliant, I've been sitting here reading voraciously for two hours or more, but the best IMO was this comment:
"...There are two possible explainations for the 1000 F surface temperature of Venus: Velikovsky's, which is that Venus is in a process of cooling either from a recent creation or from heat generated during recent catastrophic events (i.e. is natively hot), and Carl Sagan's "super greenhouse" theory, which is standard doctrine amongst astronomers, despite being ridiculous.
Sagan in fact is also noted for another super greenhouse theory, i.e. the one which says we should all be dead from the Kuwaiti oil fires in 91. Far as I know, I'm still here and Sagan is still dead. In fact, people living in Kuwait are still alive, and Sagan is still dead...
Sagan's theory would require that Venus' atmosphere be in thermal balance, i.e. since all the heat would be derived from the sun, heat taken in and given out should equal eachother.
I have noted that this is in sharp disagreement with with actual findings, and that astronomers have made a habit of doctoring the findings and have actually found themselves in the position of having to explain AWAY 100% of the raw data. All of the probes which carried infra-red flux (upward vs. downward readings) meters to the surface measured a sharp upward ir flux, which is in keeping with Velikovsky's version, but not that of Sagan.
Astronomers have posted oficial position papers (Revercomb/Suomi et. al) explaining the manner in which each and every such probe "failed", without bothering to try to explain why they should not all be summarily shitcanned for failing to oversee the proper manufacture of so simple an instrument in even one case out of at least four (instruments were not all the same)..."
Made my day!
Perhaps it was the planet believed to have smashed into the earth causing the mantle and debris to coalesce into our moon?
It was made of cheese and a moose ate it!
The theory that our Moon was captured has more credibility than that it simultaneously formed and orbited the Earth...though technically both ways are possible.
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