![]() |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
![]()
Would the evolution of intelligent life
on Earth have been possible without the moon? I find contradictory statements on the Internet. Most say that the moon is needed to stabilize the Earth axis, one Jason Barnes says that Jupiter alone could do that. |
#2
|
|||
|
|||
![]()
On Thu, 10 Jun 2021 06:35:42 -0700 (PDT), Lothar Frings
wrote: Would the evolution of intelligent life on Earth have been possible without the moon? I find contradictory statements on the Internet. Most say that the moon is needed to stabilize the Earth axis, one Jason Barnes says that Jupiter alone could do that. Venus has no moon. Is its axis unstable? Are the moons of Mars large enough to have any effect on its axis? Is its axis unstable? Is intelligent life possible on Earth even with the moon? -- Remove del for email |
#3
|
|||
|
|||
![]()
Il 10/06/2021 15:35, Lothar Frings ha scritto:
Would the evolution of intelligent life on Earth have been possible without the moon? I find contradictory statements on the Internet. Most say that the moon is needed to stabilize the Earth axis, one Jason Barnes says that Jupiter alone could do that. I think that life on Earth depends on millions of coincidences and incredibly rare events. One of them is the presence of the Moon with the right mass and the right distance from Earth. Without Moon there would not been life as we know it. Luigi Caselli |
#4
|
|||
|
|||
![]()
On 6/10/2021 6:35 AM, Lothar Frings wrote:
Would the evolution of intelligent life on Earth have been possible without the moon? I find contradictory statements on the Internet. Most say that the moon is needed to stabilize the Earth axis, one Jason Barnes says that Jupiter alone could do that. Along with what Luigi says: https://en.wikipedia.org/wiki/Rare_Earth_hypothesis "Rare Earth hypothesis The Rare Earth hypothesis argues that planets with complex life, like Earth, are exceptionally rare In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the origin of life and the evolution of biological complexity such as sexually reproducing, multicellular organisms on Earth (and, subsequently, human intelligence) required an improbable combination of astrophysical and geological events and circumstances. According to the hypothesis, complex extraterrestrial life is an improbable phenomenon and likely to be rare. The term "Rare Earth" originates from Rare Earth: Why Complex Life Is Uncommon in the Universe (2000), a book by Peter Ward, a geologist and paleontologist, and Donald E. Brownlee, an astronomer and astrobiologist, both faculty members at the University of Washington. In the 1970s and 1980s, Carl Sagan and Frank Drake, among others, argued that Earth is a typical rocky planet in a typical planetary system, located in a non-exceptional region of a common barred-spiral galaxy. From the principle of mediocrity (extended from the Copernican principle), they argued that we are typical, and the universe teems with complex life. However, Ward and Brownlee argue that planets, planetary systems, and galactic regions that are as friendly to complex life as the Earth, the Solar System, and our galactic region are rare." It is an interesting and informative book. It states the requirements for complex life include: "1.1 The right location in the right kind of galaxy 1.2 Orbiting at the right distance from the right type of star 1.3 The right arrangement of planets 1.4 A continuously stable orbit 1.5 A terrestrial planet of the right size 1.6 With plate tectonics 1.7 A large moon 1.8 Atmosphere 1.9 One or more evolutionary triggers for complex life 1.10 The right time in evolution" |
#5
|
|||
|
|||
![]()
On 2021-06-10, Lothar Frings wrote:
Would the evolution of intelligent life on Earth have been possible without the moon? I find contradictory statements on the Internet. Most say that the moon is needed to stabilize the Earth axis, one Jason Barnes says that Jupiter alone could do that. It's unclear. Our models aren't accurate enough to know with certainty some effects, hence the different results between Barnes and Laskar's earlier results from 1993 on whether the Moon does stabilize Earth's axis or not. Moreover, we don't actually know the requirements for intelligence or life in general to arise (beyond, at best, chemistry) so whether things such as tides or moderate seasonal variations are essential is still a matter of speculation. |
Thread Tools | |
Display Modes | |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Does Intelligent Life Exist On Earth? | Herbert Glazier | Misc | 1 | March 23rd 18 12:58 AM |
#89 Is there anything that Intelligent life can do to tag EMradiation as a unique signature of life itself? Tried maser, tried | [email protected] | Astronomy Misc | 3 | April 30th 08 07:02 PM |
NATIONAL HOLIDAY OF TRUTH - Ed Conrad's Birthday -- NO INTELLIGENT LIFE ANYWHERE IN THE UNIVERSE, Certainly Not on Earth | BradGuth | History | 29 | May 7th 07 11:02 PM |
NATIONAL HOLIDAY OF TRUTH - Ed Conrad's Birthday -- NO INTELLIGENT LIFE ANYWHERE IN THE UNIVERSE, Certainly Not on Earth | Rhonda Lea Kirk[_2_] | Policy | 1 | May 1st 07 11:49 AM |
Would the existance of intelligent extra-terrestrial change the destination and the meaning of human life on earth? | PR11 | Misc | 4 | November 5th 03 10:00 AM |