Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

Earth's Moon is 'cosmic rarity'
BBC News ^ | 21 November 2007 | Paul Rincon

Posted on 11/21/2007 1:12:51 PM PST by Aristotelian

Moons like the Earth's - which are formed in catastrophic collisions - are extremely rare in the Universe, a study by US astronomers suggests.

The Moon was created when an object as big as the planet Mars smacked into the Earth billions of years ago.

The impact hurled debris into orbit, some of which eventually consolidated to form our Moon.

The Astrophysical Journal reports that just 5-10% of planetary systems in the Universe have moons created this way.

(Excerpt) Read more at news.bbc.co.uk ...


TOPICS: Astronomy
KEYWORDS: capture; catastrophism; designedbygod; fauxiantrolls; goddesigned; impact; lunarcapture; lunarorigin; moon; rareearthnonsense; thankyoulord; themoon
Navigation: use the links below to view more comments.
first 1-2021-4041 next last
The moon has always struck me as an ideal example of God's handiwork. Without it, there would be no tides, and without tides, there would be no life on Earth as we know it, because water would stagnate, forming bacteria-infested cesspools, breeding infection and disease.
1 posted on 11/21/2007 1:12:51 PM PST by Aristotelian
[ Post Reply | Private Reply | View Replies]

To: Aristotelian

INSERT FAIRY TALE HERE

The Moon was created when an object as big as the planet Mars smacked into the Earth billions of years ago. The impact hurled debris into orbit, some of which eventually consolidated to form our Moon.
2 posted on 11/21/2007 1:16:21 PM PST by Scythian
[ Post Reply | Private Reply | To 1 | View Replies]

To: Aristotelian
Yeah, and slamming a "Mars sized" object into the earth would likewise prevent stagnant water and the formation of bacteria infested cesspools, also.

Lots of paths to the same ends...

3 posted on 11/21/2007 1:17:38 PM PST by willgolfforfood
[ Post Reply | Private Reply | To 1 | View Replies]

To: Aristotelian

This was claimed by Zecharia Sitchin in his Book The 12th Planet published in 1976.


4 posted on 11/21/2007 1:23:18 PM PST by #1CTYankee (That's right, I have no proof. So what of it??)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Aristotelian

I’m the same way. I look to science and astronomy as all the evidence of God that I need.


5 posted on 11/21/2007 1:31:16 PM PST by cripplecreek (Only one consistent conservative in this race and his name is Hunter.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Aristotelian

... and where did that Mars-sized object come from, and where did it go? Answer that, Sagan!!!


6 posted on 11/21/2007 1:49:25 PM PST by shekkian
[ Post Reply | Private Reply | To 1 | View Replies]

To: Aristotelian

Mars appears to have had a planet of its own at some time. That is, Mars would have been the moon of that system. What happened to its planet is not clear although it is possible some of it is in the Asteroid Belt and a piece of it could have been the body that nearly hit earth creating the moon.


7 posted on 11/21/2007 1:55:18 PM PST by RightWhale (anti-razors are pro-life)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Aristotelian

It couldn’t have happened billions of years ago. The earth is only 6,000 years old.


8 posted on 11/21/2007 1:56:54 PM PST by GreenOgre (mohammed is the false prophet of a false god.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: GreenOgre
It couldn’t have happened billions of years ago. The earth is only 6,000 years old.

Indeed the moon could have been wondering around the universe for billions of years, and when G*d created the earth, the gravitational pull of the new planet snagged the moon into place.

9 posted on 11/21/2007 2:10:59 PM PST by Tolerance Sucks Rocks (Repeal the Terrible Two - the 16th and 17th Amendments. Sink LOST! Stop SPP!)
[ Post Reply | Private Reply | To 8 | View Replies]

To: shekkian
Answer that, Sagan!!!

Carl is unusually silent today.

10 posted on 11/21/2007 3:06:47 PM PST by Zuben Elgenubi
[ Post Reply | Private Reply | To 6 | View Replies]

To: Aristotelian

Perhaps as rare as it having the same angular dimensions as the Sun at Earth’s surface, thus providing a “perfect” solar eclipse to us mere mortals at this time in history...


11 posted on 11/21/2007 4:30:38 PM PST by mikrofon (Space BUMP)
[ Post Reply | Private Reply | To 1 | View Replies]

To: mikrofon

A momentary circumstance, an instant on the cosmic timescale. The moon is already gone, escape velocity achieved.


12 posted on 11/21/2007 4:32:56 PM PST by RightWhale (anti-razors are pro-life)
[ Post Reply | Private Reply | To 11 | View Replies]

When the Days Were Shorter
Alaska Science Forum (Article #742) | November 11, 1985 | Larry Gedney
Posted on 10/04/2004 1:31:59 PM EDT by SunkenCiv
http://www.freerepublic.com/focus/f-chat/1234919/posts

New evidence for the Moon’s soft middle
New Scientist | 14 February 2002 | Will Knight
Posted on 12/27/2004 5:29:35 PM EST by SunkenCiv
http://www.freerepublic.com/focus/f-chat/1309193/posts

In the shadow of the Moon
New Scientist | 30 January 1999 | editors
Posted on 08/31/2004 11:42:25 AM EDT by SunkenCiv
http://www.freerepublic.com/focus/f-chat/1203912/posts


13 posted on 11/23/2007 9:24:50 PM PST by SunkenCiv (Profile updated Sunday, November 18, 2007"'"'"'"'"'"'"'"'"'"'https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | To 1 | View Replies]

Did an ancient impact bowl Pluto over?
New Scientist | October 5, 2007 | Maggie McKee
Posted on 10/30/2007 10:29:02 PM EDT by SunkenCiv
http://www.freerepublic.com/focus/f-chat/1918724/posts


14 posted on 11/23/2007 9:26:15 PM PST by SunkenCiv (Profile updated Sunday, November 18, 2007"'"'"'"'"'"'"'"'"'"'https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | To 1 | View Replies]

Red Planet’s Ancient Equator Located
Scientific American (online) | April 20, 2005 | Sarah Graham
Posted on 04/24/2005 11:18:25 PM EDT by SunkenCiv
http://www.freerepublic.com/focus/f-chat/1390424/posts


15 posted on 11/23/2007 9:27:05 PM PST by SunkenCiv (Profile updated Sunday, November 18, 2007"'"'"'"'"'"'"'"'"'"'https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | To 1 | View Replies]

The Moon produces slightly more than half of the tides — the rest are produced by the Sun. So, no, the Moon isn’t necessary for the Earth to have tides.


16 posted on 11/23/2007 9:30:06 PM PST by SunkenCiv (Profile updated Sunday, November 18, 2007"'"'"'"'"'"'"'"'"'"'https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | To 1 | View Replies]

To: 75thOVI; AFPhys; Alice in Wonderland; AndrewC; aristotleman; Avoiding_Sulla; BenLurkin; Berosus; ...
 
Catastrophism
 
· join · view topics · view or post blog · bookmark · post new topic ·

17 posted on 11/23/2007 9:30:58 PM PST by SunkenCiv (Profile updated Sunday, November 18, 2007"'"'"'"'"'"'"'"'"'"'https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | To 1 | View Replies]

from Ancient impact may have bowled the Moon over:
Ancient impact may have bowled the Moon over The South Pole-Aitken basin (circled) is the largest impact crater in the solar system. One edge lies on the Moon's south pole, while its centre lies about 30° away (Image: Clementine Project/LPI)

18 posted on 11/23/2007 9:34:49 PM PST by SunkenCiv (Profile updated Sunday, November 18, 2007"'"'"'"'"'"'"'"'"'"'https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | To 1 | View Replies]

Okay, there is at least one advocate of coaccretion:
Did the new moon lose its iron heart?
New Scientist
January 23, 2007
The current theory says that the material that now forms our moon was ejected when Earth was struck by another planet-sized body. But Peter Noerdlinger at Saint Mary's University in Halifax, Canada, says this theory has problems. "The collision has to be implausibly gentle. You practically need someone to hold a Mars-sized object just above Earth and drop it, to avoid messing up Earth's orbit."

The simpler idea that Earth and the moon were both created from the same gas cloud had been rejected because it could not explain why Earth formed an iron core and the moon did not. Now, Noerdlinger has an answer for that.

He suggests that the proto-moon did have an iron core, but that the satellite was ripped apart in a close encounter with Earth. His calculations show that iron from the core would be pulled towards Earth, while the remains of its rocky outer shell reassembled into our iron-free moon.

This fits with evidence that the Earth acquired a veneer of iron after it formed, Noerdlinger says. He presented the work at the American Astronomical Society meeting in Seattle, Washington, last week.

From issue 2587 of New Scientist magazine, 23 January 2007, page 16

19 posted on 11/23/2007 9:35:43 PM PST by SunkenCiv (Profile updated Sunday, November 18, 2007"'"'"'"'"'"'"'"'"'"'https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Aristotelian
I don't think it is nearly as rare in the universe as the writer implies...

The primary reason that I say that is because we only recently discovered that there are literally a billion other galaxies, and at this point we have only surveyed a few dozen or so with telescopes of different varieties and only a couple of those are close enough to determine that some of the systems have one or more planets.

We are not close enough to any of those to determine how many or what kind of moons they may have, and certainly not how they were formed. We can only prove that some sort of planet exists because of orbital anomalies in their suns. We cannot actually see any planets at all, much less moons.

Collisions must be common during the formation of galaxies and their planetary systems because everything starts out as a compact cluster of gas and building block materials. Collisions are a part of that formation and not only do they occur, they must occur.

Nope.....the moon is not all that special to anyone but us. Sure it is important to Earth and it's ability to grow so much life, but their certainly could be billions of other Earths in the universe.....Billions (in my most humble opinion)

20 posted on 11/23/2007 10:01:55 PM PST by Cold Heat (Mitt....2008)
[ Post Reply | Private Reply | To 1 | View Replies]


Navigation: use the links below to view more comments.
first 1-2021-4041 next last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson