Solar System Reflection

882 Words 4 Pages
Register to read the introduction… It goes on to describe how particles grow by condensation, the process of adding matter to an atom or molecule. Once they get to a big enough size, the particles start to stick to others through a process called accretion. Planetisimals continue to grow by colliding and sticking to others until it gets large enough to turn into a protoplanet. The stage where iron falls to the core and heat is generated while lighter materials stay on the outside to create the earths crust. What I did not like about the video is how they do not specify how long it takes for it to turn into a protoplanet from a planetisimal. The woman talks about millions of years to get to the diameter of the particle to centimeters until they start to collide, but lacks the information of how long the collisions take to get bigger. They could improve the video by adding these details into it. What I liked about the video is how it goes in depth about protoplanets and the gravitational collapse as the textbook had me somewhat confused.

The 3rd video is the extra solar planets. It is about how to detect planets outside of our solar system that
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It discusses how Italian astronomer Piazzi discovered the first asteroid. Now there are over 100,000 asteroids that lay in the asteroid belt near mars and Jupiter. They also describe the reason the asteroids are in the belt could be due to a planet that never formed. The pull of Jupiter’s gravity kept the particles accelerating so fast, they could never accrete. What I liked about the video is how it spent the most time discussing why the asteroid belt exists as that caught my attention the most in the textbook, where its only mentioned briefly. What I didn’t like about the video is it didn’t discuss the shapes and size of the asteroids themselves. To improve this video I would’ve added some interesting facts from the textbook such as some are asteroids are 200km in

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