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The moon formed after a nasty planetary collision with young Earth, yet it looks odd next to its watery orbital neighbor. Turns out it really is odd: Only about one in every 10 to 20 solar systems may harbor a similar moon.
New observations made by NASA's Spitzer Space Telescope of stellar dust clouds suggest that moons like Earth's are—at most—in only 5 to 10 percent of planetary systems.
"When a moon forms from a violent collision, dust should be blasted everywhere," said Nadya Gorlova, an astronomer at the University of Florida in Gainesville who analyzed the telescope data in a new study. "If there were lots of moons forming, we would have seen dust around lots of stars. But we didn't."
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.
Originally posted by squiz
Everything (IMO) points to a catastrophe for the entire solar system somewhere between 12,000 and 20,000 years ago. The planetary systems were disrupted by an event, most probably caused by Venus.
Originally posted by sherpa
Well I have got to agree with the OP's post, it is only this year that I started reading what I could find about our moon and it has left me with more questions than answers.
One anomaly that fascinates me is the case of TLP's, Transient Lunar Pnenomena, brightenings and obscurations of the lunar surface observed over the centuries by astronomers all over the world.
It seems a shame that for a time these observations were not academically recognised.
Originally posted by squiz
Ever wonder why there are no prehistoric references to the moon? what you can find are references or rather myths that talk of when the moon was not in our skies.
I am not so sure about the theories that say our moon is artificial and the like, but I find it cool that out moon could be a rare one.
Originally posted by yeti101
to say our moon is rare on this data is totally false
why would the moon being rare be cool?