Study Suggests Giant Impact Did Not Form the Moon...So What Then?

Hello and welcome! My name is Anton and in this video, we will talk about a new study that suggests Theia collision hypothesis is maybe not the best answer to how the Moon formed
Links:
Other videos:

0:00 Is giant impact hypothesis incorrect?
1:00 Why do we think Earth and Moon were the result of a collision?
3:30 Potential explanations on how this happened
5:00 Why this is important
5:35 Unanswered questions
7:25 The biggest issue with this hypothesis
8:45 Isotopes are identical and no sign of impact
9:30 Conclusions and potential explanations
11:00 So Moon is a planet...maybe?
11:55 But we won't know more until future missions

#theia #moon #impact

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[decyattysyachpchyol]

Your work is how science journalism should be.

[jeffmccloud]

When two planets love each other very very much...

[purplexs]

Ever since reading Issac Asimov's "The Triumph/Tragedy of the Moon", I have been convinced that the Moon and its origin are fundamental to the uniqueness of Earth and everything on it.
This is one of your best presentations Anton, on a subject that is always absorbing.

[Mboogy]

Let us all be thankful that this might be the only place on Youtube, where someone cultivates one of the best comment sections I've ever seen...

Give this guy whatever Youtube award they got!!!!

[carmenpop]

I have no idea why, but some Romanian stories start like this: "once upon a time when the moon was not in the sky..."

[arctic_haze]

This is a surprising development. The collision hypothesis has some problems but without an impact, it is even harder had to explain why the isotopic content of both bodies is so similar. My favorite version is that Theia (as we call the hypothetical impactor) was formed in the same region of the Solar System as the Earth and hence had practically the same isotopic content. This would also explain why the collision was inevitable and why it happened so early.

[smithologist]

Alien monitoring station... I knew it..

[cynhanrahan]

I remember being taught the collision hypothesis in school early on. The teacher said the collision pried the moon out of where the Pacific ocean is now. This was in the early 1970s. Later on in my high school and college years the evidence didn't add up, especially given plate tectonics had shifted the Pacific around and the topography of the floor was not a dent at all. Very interesting, Anton. You always make me think.

[robotaholic]

I love how you steal man and argument with which you disagree and then completely obliterate the steel man. It is the absolute best way to disprove something completely. You're the man!

[mRibbons]

The formation of planets has got to be equal parts majestic and horrifying to behold.

[chrisellis]

The Magratheans had some building materials left over….won an award for it 🤔😉😬

[andrewshelley]

Very few parts of the moon have actually been geologically sampled, though.

[HansVanIngelgom]

The unanswered question in this video is why different objects have different oxygen isotopes. The answer to that question would put limits on the formation. Also: 1AM here. I am never drinking an energy drink ever again.

[skywalker]

Anton and his channel deserves every like as his scientific analysis os tops

[Salamander]

This is one of your best videos, a most interesting one. Finally, new ideas, thank you!

[victorkrawchuk]

If the Theia hypothesis is correct it was most likely a trojan of the Earth whose orbit destabilized and collided with the Earth when it reached 10% of the Earth's mass via accretion. If the Earth and Theia originally formed in the same orbit, and from the same parts of the same early solar system accretion disk, shouldn't these two bodies also be expected to have been constituted from the same materials and isotopes when they collided? This logic was used to justify the idea that the Earth and the Moon simply formed at the same time from the same area of the accretion disk, so why can't it also explain the similarity of Theia to the Earth when Theia was a trojan of the Earth?

[douglaswilkinson]

When the Earth was molten heavy metals sank to its core. Once solid meteor impacts such as the one 214M years ago that created the Manicouagan Crater deposited an enormous amount of iron which is mined today) brought many of the metals that are found on the Earth's surface.

[stephenbailey]

Glad you finally figured it out for us, we were all so worried

[officiallymarvellous]

I feel so smart just by subscribing to Anton's channel since 2015

[musicsmile]

Thank you Anton! Your videos are always informative and appreciated!