Link to the [original article](https://www.nasa.gov/solar-system/collision-may-have-formed-the-moon-in-mere-hours-simulations-reveal/) on NASA website
Billions of years ago, a version of our Earth that looks very different than the one we live on today was hit by an object about the size of Mars, called Theia – and out of that collision the Moon was formed. How exactly that formation occurred is a scientific puzzle researchers have studied for decades, without a conclusive answer.
Most theories claim the Moon formed out of the debris of this collision, coalescing in orbit over months or years. A new simulation puts forth a different theory – the Moon may have formed immediately, in a matter of hours, when material from the Earth and Theia was launched directly into orbit after the impact.
No. As far as we know, the two events are not related. The "scar" that you are referring to is Valles Marineris, which scientists think might've been formed from a combination of the crust of Mars ripping apart from the force of the mantel and erosion. We aren't able to confirm this AFAIK because we haven't gotten close enough to check out the canyon yet.
What OP posted is a single frame from a short simulation. [You can find the simulation on NASA's website](http://science.nasa.gov/moon/formation) and on YouTube. In the video, Theia (the name for the planet that we think smashed into the Earth) absolutely decimates both Earth and itself. In the resulting chaos, most of it gets absorbed into the Earth, while a small chunk coalesces a ways away, becoming the moon. If the simulation holds true, then there would be no way for it to have been Mars that hit Earth.
I think the [Theia theory](https://science.nasa.gov/moon/formation/) is something about 1/4 size hit the earth and a part of it is still identified in the earth’s layers. Much of the planet was liquified at that point and a glob of the ejected material came into orbit. [Here is a simulation of that theory](https://youtu.be/kRlhlCWplqk?si=muQjpyAI4T77A_Wr).
It’s possible some of it continued on and hit mars but I don’t think there is any academic links demonstrating a connection.
You need to understand, that when 2 planet-size objects collide, they become completely liquified into 100% magma.
Also, Theia *became* the moon. Well, part of it did.
I can’t find it anywhere but I read that a second galaxy within the Milky Way was recently discovered. It was much smaller and cannibalized by the Milky Way and could have actually converged right around where our solar system is. I’ve never even thought about rogue solar systems or galaxies. Could be evidence to being more rare than we think.
It definitely would have brought some with it, but based on the specific isotopes found in the oceans most of it likely came from Carbonaceous chondrites, a type of asteroid, which would have impacted Earth countless times during the bombardment eras
I saw the "Giant Impact Hypothesis" first back when it was just being proposed at an exhibit at the planetarium in NYC. Cool we're refining what we know about the possibilities!
When it was born the Earths rotation was much faster. The moon was also glowing red since it was molten and also much larger in the sky because it was formed much closer than it is now. We had multiple enormous glowing eclipses/red moonlight nights every 24 hours in the past. The tidal forces also caused much larger tsunami-like tides multiple times every 24 hours. If we couldve been there it wouldve been a beautiful and terrifying event.
Tidal forces affect the planet as a whole, it's just that water is more mobile so we can see it happening. On earth it's only strong enough to change the speed of rotation, but with bigger planets tidal forces can rip apart moons that orbit closer than the roche limit. Jupiter's moon Io is very close to to that limit, causing it to undergo extreme geological activity, with massive mountain ranges and hundreds of active volcanoes.
Pretty sure I recently heard on a podcast that the lady who wrote the book where she shared this hypothesis regretted sharing it, as it has become so popular that many people believe it is a theory, when it was just a creative and informed guess. Apologies for not being able to credit her or remember where I heard this, but maybe someone else has the info.
The moon is made of cheese guys !!!
Come on did they not teach you anything as a child ???
And the moon is actually owned by the man on the moon
Amazing how stories get twisted as they get passed down …….
The man on the moon will be livid at this nonsense
When I was younger, moons were made in hours. We haven’t had a new moon made in years. Nobody wants to work anymore!
Universes these days just don’t wanna work!
The worst thing about it is the hypocrisy
Link to the [original article](https://www.nasa.gov/solar-system/collision-may-have-formed-the-moon-in-mere-hours-simulations-reveal/) on NASA website Billions of years ago, a version of our Earth that looks very different than the one we live on today was hit by an object about the size of Mars, called Theia – and out of that collision the Moon was formed. How exactly that formation occurred is a scientific puzzle researchers have studied for decades, without a conclusive answer. Most theories claim the Moon formed out of the debris of this collision, coalescing in orbit over months or years. A new simulation puts forth a different theory – the Moon may have formed immediately, in a matter of hours, when material from the Earth and Theia was launched directly into orbit after the impact.
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No. As far as we know, the two events are not related. The "scar" that you are referring to is Valles Marineris, which scientists think might've been formed from a combination of the crust of Mars ripping apart from the force of the mantel and erosion. We aren't able to confirm this AFAIK because we haven't gotten close enough to check out the canyon yet. What OP posted is a single frame from a short simulation. [You can find the simulation on NASA's website](http://science.nasa.gov/moon/formation) and on YouTube. In the video, Theia (the name for the planet that we think smashed into the Earth) absolutely decimates both Earth and itself. In the resulting chaos, most of it gets absorbed into the Earth, while a small chunk coalesces a ways away, becoming the moon. If the simulation holds true, then there would be no way for it to have been Mars that hit Earth.
I think the [Theia theory](https://science.nasa.gov/moon/formation/) is something about 1/4 size hit the earth and a part of it is still identified in the earth’s layers. Much of the planet was liquified at that point and a glob of the ejected material came into orbit. [Here is a simulation of that theory](https://youtu.be/kRlhlCWplqk?si=muQjpyAI4T77A_Wr). It’s possible some of it continued on and hit mars but I don’t think there is any academic links demonstrating a connection.
You need to understand, that when 2 planet-size objects collide, they become completely liquified into 100% magma. Also, Theia *became* the moon. Well, part of it did.
Could we have gotten our water from Theia?
That would just pose the question of where Theia got it from.
Reminds me of the panspermia theory for life on earth. It doesn’t really answer how life was first created.
Wouldn’t be unlikely if Theia came from outside the solar system or from its outer edges.
I can’t find it anywhere but I read that a second galaxy within the Milky Way was recently discovered. It was much smaller and cannibalized by the Milky Way and could have actually converged right around where our solar system is. I’ve never even thought about rogue solar systems or galaxies. Could be evidence to being more rare than we think.
Could you be talking about the [Gaia-Sausage?](https://en.m.wikipedia.org/wiki/Gaia_Sausage)
there's something amusing about the Gaia Sausage causing the Milky Way as we know it
It definitely would have brought some with it, but based on the specific isotopes found in the oceans most of it likely came from Carbonaceous chondrites, a type of asteroid, which would have impacted Earth countless times during the bombardment eras
I saw the "Giant Impact Hypothesis" first back when it was just being proposed at an exhibit at the planetarium in NYC. Cool we're refining what we know about the possibilities!
When it was born the Earths rotation was much faster. The moon was also glowing red since it was molten and also much larger in the sky because it was formed much closer than it is now. We had multiple enormous glowing eclipses/red moonlight nights every 24 hours in the past. The tidal forces also caused much larger tsunami-like tides multiple times every 24 hours. If we couldve been there it wouldve been a beautiful and terrifying event.
moon formed 4.5 billion years ago. Ocean formed 3.8 to 3.9 billion years ago. I do not think that tidal theory is correct.
Yeah that makes sense. Perhaps the tidal forces wouldve been visible affecting other things. Maybe the molten surface?
Tidal forces affect the planet as a whole, it's just that water is more mobile so we can see it happening. On earth it's only strong enough to change the speed of rotation, but with bigger planets tidal forces can rip apart moons that orbit closer than the roche limit. Jupiter's moon Io is very close to to that limit, causing it to undergo extreme geological activity, with massive mountain ranges and hundreds of active volcanoes.
The tidal theory also involves the sun. It's the side effect of gravitational forces.
Mere hours? That's pure lunacy!
I hate you
This comment is too good to be so far down.
Pretty sure I recently heard on a podcast that the lady who wrote the book where she shared this hypothesis regretted sharing it, as it has become so popular that many people believe it is a theory, when it was just a creative and informed guess. Apologies for not being able to credit her or remember where I heard this, but maybe someone else has the info.
I thought this was the leading theory because it explains the geological similarity of the moon and earth
I guess one of us will have to look it up to know then, lol. I think it's just a hypothesis, regardless.
I have to correct myself and say leading hypothesis not theory
What are you talking about?
The origin of a popular hypothesis about the formation of Earth's moon. - Not sure why you downvoted me for simply answering your question.
Cuz Reddit
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MOONFALL
The moon is made of cheese guys !!! Come on did they not teach you anything as a child ??? And the moon is actually owned by the man on the moon Amazing how stories get twisted as they get passed down ……. The man on the moon will be livid at this nonsense
I scrolled by and read that as, "Colin Hay created the moon...."
"It came from a space down under...in a land of dark and thunder"
It was a very bad weekend.
Wasn't this news a few years ago?
.... around a space craft that still remains below the surface today....
Which earth quakes have helped us map