To: BenLurkin
The Earth has an iron core that is about 1.5X larger than it should be. The theory is that the Earth was impacted by a Mars sized object. The iron cores combined, but other material ejected, and formed the Moon.
Without this impact, we would not have the strong magnetosphere, to protect us, nor would we have the Moon that stabilizes the Earth's rotation. The Earth would be a very chaotic place, and it's likely life would not have evolved past a biologic sludge.
That is why I find it ridiculous that people keep calling exoplanets, 'Earth-like', because they are not. In order for a planet to be truly 'Earth-like', it MUST have what the Earth received in the massive collision that created the Moon. And if you calculate the odds of that, it makes the Earth a MUCH rarer commodity.
19 posted on
12/12/2017 11:09:15 AM PST by
MMaschin
(The difference between strategy and tactics!)
To: MMaschin
20 posted on
12/12/2017 11:09:55 AM PST by
BenLurkin
(The above is not a statement of fact. It is either satire or opinion. Or both.)
To: MMaschin
That is why I find it ridiculous that people keep calling exoplanets, 'Earth-like', because they are not. Exactly. Venus is the most "Earth-like" planet ever found. It is almost the same size and mass and has relatively close to the same orbit around the same star. From a few light years away you would think that Earth and Venus are identical.
33 posted on
12/12/2017 11:33:35 AM PST by
Bubba_Leroy
(The Obamanation has ended!)
To: MMaschin
What you wrote makes it even more miraculous that we are even hear and even more ridiculous that humans spend as much time doing what we do day in and day out. The chances of us even being here is infinitesimal, and we sit here and argue about nonsense.
37 posted on
12/12/2017 11:39:52 AM PST by
thefactor
(yes, as a matter of fact, i DID only read the excerpt)
To: MMaschin
In order for a planet to be truly ‘Earth-like’, it MUST have what the Earth received in the massive collision that created the Moon. And if you calculate the odds of that, it makes the Earth a MUCH rarer commodity.
Yep. Just check out the estimated 100,000,000,000,000,000 stars so far discovered in the universe and you will see that there cannot be any other planet anywhere like Earth because there just aren’t enough stars in the universe ... /s
Of course, the Earth-Moon collision, as well a the origin of Earth’s core, are all theories and you know what happens to theories in time, right?
39 posted on
12/12/2017 11:41:19 AM PST by
PIF
(They came for me and mine ... now it is your turn ...)
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