Just updating the ping list info.
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Posted on 10/04/2004 10:31:59 AM PDT by SunkenCiv
Present-day nautilus shells almost invariably show thirty daily growth lines (give or take a couple) between the major partitions, or septa, in their shells. Paleontologists find fewer and fewer growth lines between septa in progressively older fossils. 420 million years ago, when the moon circled the earth once every nine days, the very first nautiloids show only nine growth lines between septa. The moon was closer to the earth and revolved about it faster, and the earth itself was rotating faster on its axis than it is now. The day had only twenty-one hours, and the moon loomed enormous in the sky at less than half its present distance from earth.
(Excerpt) Read more at dogbert.gi.alaska.edu ...
http://hypertextbook.com/facts/2002/AdaLi.shtml
“The moon’s mass is about 0.012 times that of the Earth... The moon’s gravity is one-sixth that of the Earth.”
How then can it have 1/6 of Earth gravity?
Hey, believe whatever you want. Here’s something for you to puzzle over, Mars is about ten percent the mass of the Earth, and yet...
http://www.nineplanets.org/mars.html
“The average pressure on the surface of Mars is only about 7 millibars (less than 1% of Earth’s), but it varies greatly with altitude from almost 9 millibars in the deepest basins to about 1 millibar at the top of Olympus Mons.”
Moon is .01230769231 Earth mass.
It odd - but in The Time Machine by H. G. Wells the oceans of the future are portrayed as calm - flat - with few waves - an image that’s appeared in other science fiction stories about a far distant future. Seems the collective subconscious understands moon power’s effect on waves wanes over time.
There’s an old Welsh tale (in the Mabinogeon) that recalls that the seas were once quiet and flat. Naturally there’s a very odd “explanation” for how the tides began.
Also (dunno the exact source, it’s probably in Bulfinch or Geoffrey of Monmouth or both) there were guardians of wells and springs in pre-Roman Britain (and actually all through Roman times and into the Middle Ages it held on here and there) who did mumbo-jumbo to keep the wells from overflowing and flooding the world. Similar or analogous traditions existed elsewhere in Europe and beyond. The modern survival of this is tossing coins in the fountains and pools (I kid you not).
The ancient Attic Greeks (they had to stay up there, especially when there was company) held that they’d lived in that area since before there was a Moon.
Interesting. I enjoy historical truvia - thanks for sharing. ( true/trivia )
#4
That is very interesting
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Note: this topic is from 10/04/2004. A big thank you to the late Larry Gedney.
The Earth Without the Moon
The period when the Earth was Moonless is probably the most remote recollection of mankind. Democritus and Anaxagoras taught that there was a time when the Earth was without the Moon.(1) Aristotle wrote that Arcadia in Greece, before being inhabited by the Hellenes, had a population of Pelasgians, and that these aborigines occupied the land already before there was a moon in the sky above the Earth; for this reason they were called Proselenes.(2)
Apollonius of Rhodes mentioned the time when not all the orbs were yet in the heavens, before the Danai and Deukalion races came into existence, and only the Arcadians lived, of whom it is said that they dwelt on mountains and fed on acorns, before there was a moon. (3)
Plutarch wrote in The Roman Questions: There were Arcadians of Evanders following, the so-called pre-Lunar people.(4) Similarly wrote Ovid: The Arcadians are said to have possessed their land before the birth of Jove, and the folk is older than the Moon. (5) Hippolytus refers to a legend that Arcadia brought forth Pelasgus, of greater antiquity than the moon.(6) Lucian in his Astrology says that the Arcadians affirm in their folly that they are older than the moon.(7)
Censorinus also alludes to the time in the past when there was no moon in the sky.(8)
Some allusions to the time before there was a Moon may be found also in the Scriptures. In Job 25:5 the grandeur of the Lord who Makes peace in the heights is praised and the time is mentioned before [there was] a moon and it did not shine. ...
http://www.varchive.org/itb/sansmoon.htm
Merry Christmas!
Thanks! Maybe this year... ;’)
Whoops! Earth’s Oldest ‘Diamonds’ Actually Polishing Grit
LiveScience | 1/3/2014 | Becky Oskin
Posted on 1/3/2014 5:26:38 PM by aimhigh
https://www.freerepublic.com/focus/news/3108059/posts
Moon Data Reveal Large Increase In Asteroid Impact History
Lonnie Shekhtman January 17, 2019
https://scitechdaily.com/moon-data-show-large-increase-in-asteroid-impact-history/
By analyzing data on lunar craters provided by the Diviner instrument aboard the Lunar Reconnaissance Orbiter, scientists have made a fascinating discovery about the history of impacts on both the Earth and the Moon. Watch this video to learn more.
Video Produced & Edited by David Ladd
Visualizations by Ernie Wright
Music Provided by Killer Tracks: "The Starting Squad" -- David Corboy & Guido Castillo
Credit: NASA's Goddard Space Flight Center
If you liked this video, subscribe to the NASA Goddard YouTube channel: http://www.youtube.com/NASAExplorer
Follow NASA's Goddard Space Flight CenterMoon Sheds Light on Earth's Impact History
Note: this topic is from .
The number of asteroid impacts to the Moon and Earth increased by two to three times starting around 290 million years ago, researchers reported in a paper in the journal Science.
They could tell by creating the first comprehensive timeline of large craters on the Moon formed in the last billion years by using images and thermal data collected by NASA's Lunar Reconnaissance Orbiter (LRO). When the scientists compared those to the timeline of Earth's craters, they found the two bodies had recorded the same history of asteroid bombardment -- one that contradicts theories about Earth's impact rate.
For decades, scientists have tried to understand the rate that asteroids hit the Earth by carefully studying impact craters on continents and by using radiometric dating of the rocks around them to determine the ages of the largest, and thus most intact, ones. The problem is that many experts assumed that early Earth craters have been worn away by wind, storms, and other geologic processes. This idea explained why Earth has fewer older craters than expected compared to other bodies in the solar system, but it made it difficult to find an accurate impact rate and to determine whether it had changed over time.
A way to sidestep this problem is to examine the Moon. Earth and the Moon are hit in the same proportions over time. In general, because of its larger size and higher gravity, about twenty asteroids strike Earth for every one that strikes the Moon, though large impacts on either body are rare. But even though large lunar craters have experienced little erosion over billions of years, and thus offer scientists a valuable record, there was no way to determine their ages until the Lunar Reconnaissance Orbiter started circling the Moon a decade ago and studying its surface.Moon Data Reveal Large Increase In Asteroid Impact History | Lonnie Shekhtman | NASA's Goddard Space Flight Center | SciTechDaily | January 17, 2019
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