ASTR 101 Chapter Notes - Chapter 14, 21: Kuiper Belt, Ammonia, Transiting Exoplanet Survey Satellite
Document Summary
Despite regularities in planetary orbits and rotation, we have to deal with. Despite temperature dictating what elements are found on planets, it is difficult to explain how water is present on earth and mars. We use radioactive dating of primitive meteorites (4. 5 billion years old) It collapsed under its own gravity and concentrated in the center. Began to rotate faster to conserve angular momentum. The disk gradually cooled and stabilized while the star formed in the center. This process heated the protoplanets to above the melting temperature of the rocks. Protoplanets grew larger due to presence of ices in addition to rocks. Heated by the falling of hydrogen and helium onto their cores. Comets probably formed near uranus and neptune and were ejected to the. 50% of protostars are gravitationally bound to one or more stars (star system) We observe forming stars with the hubble space telescope.
