Earth may have underground 'ocean' three times that on surface

[Faith No More]

If when geologists say "there is enough water in the earth", creationists believe them, who do creationists not believe them when the same geologists say "it has never been on the surface"?

Do you really even have to ask?

[Wyrd of Gawd]

Some folks think that magic comets brought all of the water to Earth. They can't imagine that the Earth makes its own water as well as oil and various gases.

[Anomalocaris]

Some folks think that magic comets brought all of the water to Earth. They can't imagine that the Earth makes its own water as well as oil and various gases.

Actually, while earth made all of its own oil and natural gas (the kind you burn in gas fired stoves in kitchens) it didn't make most of the other gases found in the atmosphere or inside the earth. It didn't make any of the water on its surface, in its oceans, on bond up chemically inside rocks deep within the earth.

All water on earth did come from comets, and there is nothing magical about these comets. The comets which brought water to earth are all, as far as we know, normal run of the mill comets. The main question is when did the comets bearing most of the water currently on the surface of the earth arrive. Did it arrive while the earth was forming, and the water became incorporated into the forming earth and them later erupted onto the surface via volcanos, or did arrive with comets that hit the earth after the formation process was essentially complete.

[Cyberman]

If you squeezed all the bullshit out of creatards you could make a gigantic-sized turd.

Or one life-size Ken Ham.

[Cyberman]

Some folks think that magic comets brought all of the water to Earth. They can't imagine that the Earth makes its own water as well as oil and various gases.

“Magic“ comets? What, those big showbiz bastards made of dust, ice and hydrocarbons, that tend to crash into planets like Shoemaker-Levy 9 did and would have done even more so back when the Solar System had far more loose debris in unstable orbits than it does now? Yeah, no way could they have deposited anything here. It must have been magic.

[JuliaL]

All water on earth did come from comets, and there is nothing magical about these comets. The comets which brought water to earth are all, as far as we know, normal run of the mill comets.

Is there any consensus opinion on where the water in comets came from?
And why they are so watery rather than rocky?

I ask as someone profoundly astro-geologically ignorant.
.

EDIT:
OK, I'm not too lazy to look at the internet right in front of me.

"Comets are some of the material left over from the formation of the planets. "
"So the Sun is the collapsed core of an interstellar gas cloud, and the planets, asteroids and comets are small lumps of dust or ice chunks which stayed in orbit instead of spiraling into the Sun. "

So I gather that they formed something like giant snowflakes from the atomic hydrogen and oxygen which formed water in a dust and gas cloud.

[Anomalocaris]

All water on earth did come from comets, and there is nothing magical about these comets. The comets which brought water to earth are all, as far as we know, normal run of the mill comets.

Is there any consensus opinion on where the water in comets came from?
And why they are so watery rather than rocky?

I ask as someone profoundly astro-geologically ignorant.
.

Comets are actually partly rocky. They are actually a mixture of water ice, rocky material, and carbonaceous material.

The water in the comets came from the original nebula from which the whole solar system formed. We can confirm through direct mseasurement nebulas in which active star formation are happening now are all high in water molecule content. So we believe the nebula in which the sun formed was high in water content too.

[Jackalope]

Is there any consensus opinion on where the water in comets came from?
And why they are so watery rather than rocky?

I ask as someone profoundly astro-geologically ignorant.
.

Comets are actually partly rocky. They are actually a mixture of water ice, rocky material, and carbonaceous material.

The water in the comets came from the original nebula from which the whole solar system formed. We can confirm through direct mseasurement nebulas in which active star formation are happening now are all high in water molecule content. So we believe the nebula in which the sun formed was high in water content too.

As for where the water originally came from - hydrogen of course is ubiquitous. Oxygen is a byproduct of stellar fusion/supernovae. Add energy - and you have water.

[Anomalocaris]

"Comets are some of the material left over from the formation of the planets. "
"So the Sun is the collapsed core of an interstellar gas cloud, and the planets, asteroids and comets are small lumps of dust or ice chunks which stayed in orbit instead of spiraling into the Sun. "

So I gather that they formed something like giant snowflakes from the atomic hydrogen and oxygen which formed water in a dust and gas cloud.

Yap.


The reason why comets have much higher percentage of water than earth, even though both earth and comets formed out of what was originally the same material is simply this. Because earth started to form much closer to the infant sun, it comsisted of a high percentage of material from the part of the protoplanetary disk that had been close to the infant sun and had been baked dry by the radiant energy of the infant sun. As earth grew to large size, its gravity increased and ensured most of the material it collected from the solar nebula fell with great force. This further boiled off much of the water that did make it to the earth. So in the end earth was left mostly with rocks, which can withstand heat and solar radiation, and comparatively small inventory of water and gases.

Comets mostly formed far from the infant sun, where the radiant energy of the sun is slight, and not enough bake the raw material dry. Comets are small, and have little gravity, so most of the stuff a comet sweeps up from the protoplanetary nebula accreted to the comet with little force. So the water is not boiled off in the process of colliding with the comet. This is why comets are left with high percentage of water.

[Minimalist]

If you squeezed all the bullshit out of creatards you could make a gigantic-sized turd.

Or one life-size Ken Ham.

Same thing.