We Shouldn't Be Here

More and better evidence suggests the Moon's origin was a collision event. The scenario is the proto-Earth was struck by a Mars-sized planetoid called Theia. I don't why proto-Earth doesn't have a name.

Large chunks of an alien material are found within the Earth. Rock samples with an entirely differeent chemistry, proto-Earth rocks, have been found. Not surprising the way the early solar system (or any system) has stuff flying everywhere. So, what about proto-Earth?

Find the mass of proto-Earth. Mass of  Proto-Earth + Theia = Earth + Moon. The Moon is 1/6 Earth's mass. Theia was theorized to be Mars sized and so 1/2 of Earth Mass. So, X +.5 = 1.666, subtract from both sides and the mass of Proto-Earth was 1.16, slightly heavier than Earth, heavier still due to a lot of debris escaped. Collisions models suggest not just one strike but multiples from debris before things settled down into what we got now.

If there had been no collision, what would be here? Well, let's talk about the snow line. Infant stars lighting up a baby solar system produce heat and light that keeps volatile chemical compounds and molecules from condensing, volatile things like water. Planets formed within the snow line have only chemically bound water. Planets formed outside the snow line have lots of water.

So a heavy metal planet like Mercury or Venus, a bigger sister to Venus, is what our old girl looks like. 

No life.

If I were an alien, I would not be expecting Earth to be there. Oh sure, it is not an abomination or anomaly, but still quite rare and easy to dismiss or overlook. We shouldn't be here at all.

Other things. I finally mounted a bronze piece I did about two or three years ago. My face sitting at the bottom of my locker. What I mean by that is I did a plaster cast of my face as a class demo, and then used it a few times in slip cast clay and wax-to-bronze before it fell apart. It didn't produce a very good likeness for a rushed demo so I had fun with the casts instead. 

Our Founder. 2025 Bronze. 

For reference, here I am currently.