First Evidence of a Giant Exoplanet Collision

Discover ^ | February 18, 2019 | Jake Parks

[SunkenCiv]

A planetary collision is exactly as bad as you would imagine. Unlike an asteroid impact, there's not just a crater left behind. Instead, such a massive crash causes the surviving world to be stripped of much of its lighter elements, leaving behind an overly dense core. Credit: NASA/JPL-Caltech

[SunkenCiv]

In before the first moron makes a moronic boilerplate comment about seeking grants.

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[UCANSEE2]

It seems amazing that we know the ‘density’ of the core of a distant planet, but still aren’t sure what is at the core of Earth, or even what’s at the bottom of the ocean.

[Ciaphas Cain]

...or even what’s at the bottom of the ocean..

Let's ask Morgan Freeman, he knows the answer!

[wastedyears]

And they’re going to try to prove their hypothesis without direct observation.

[wastedyears]

[W.]

Makes ya wonder about them experts, eh?

[vannrox]

Somehow I am reminded of Immanuel Velikovsky’s Worlds in Collision.

[MadMax, the Grinning Reaper]

Pictures at 11:00.

[zeestephen]

1.5 times the radius of Earth with a core that is 70% iron.

So, maybe on the order of 1 billion cubic miles of iron?

That's a whole lot of rebar and steel framed buildings.

[Psalm 73]

"...but still aren’t sure what is at the core of Earth, or even what’s at the bottom of the ocean."

Or still don't know what happened to Hillary's emails....

[Sirius Lee]

That's a whole lot of rebar and steel framed buildings.

Good luck taking off from such a planet with your payload. Assuming you survived the "landing".

[Vaquero]

Perhaps Tabby’s Star is the result of planetary collision and not a Dyson sphere.

[epluribus_2]

look up Younger Dryas Impact and ignore the establishment dead-enders. It happened. Changed Everything. We remembered it. Proof is in the ground now, nearing acceptance stage of academic grief.

[RandallFlagg]

I still watch that movie from time to time. It’d be a prime candidate for an MST3K riff.

[Vaquero]

Though dated. George Pal sci-fi movies were great in their day. My favorite being War Of The Worlds

[Vaquero]

The ‘comet’ that probably crunched the Laurentide Ice Sheet, 12000 years ago. Sent a warming world back into another millennium of ice age and perhaps helped kill off the Pleistocene megafauna ( along with our help)

[RandallFlagg]

Ditto with Pal’s The Time Machine.

MMMmmmmm. Weena.

[zeestephen]

Re: “Good luck taking off from such a planet with your payload.”

I have a feeling that trying to mine or refine basic materials in space, or in near Earth orbit, will never be commercially viable.

Rare minerals and rare elements - maybe.

[CharleysPride]

“Pictures at 11:00.”

Ahh...good early RP solo work.