PPT-How are Planets Formed? Pre-solar nebula

Protoplanetary disk condensation and accretion Solar wind beginning of fusion Collisions continue Planetary migration orbits shifting Late Heavy Bombardment Hadean Era Planetary Evolution. Our Solar System and Its Origin. . How was the Solar System Formed?. A viable theory for the formation of the solar system must be . based on physical principles (conservation of energy, momentum, the law of gravity, the law of motions, etc.), . Building Part 1. Solar Nebula’s Chemical Composition. Chemical Composition. Everything astronomers know about the solar system indicates that it . began as an interstellar gas cloud. .. Cloud would have been mostly hydrogen with some helium – small amounts of the heavier elements.. Part 1. Survey of the solar system. 1. What do you know (or think you know)?. Confer with your tablemate (or people in front or back of you) and write down five things you think you know about our solar system. . The outer planets are called Jovian or Jupiter-like.. These planets are made of gas and are several times more massive than the Earth.. The Jovian planets grew to present size in about 10 million years.. Solar System:. The sun and all of the planets and other bodies that travel around it. Planet. A celestial body that orbits the sun, is round because of its own gravity, and has cleared the neighborhood around its orbital path. The . Milky Way Galaxy. , one of billions of other galaxies in the universe, contains about 400 billion stars and countless other objects.. Why is it called . the “Milky Way?”. Welcome to your Solar System, how well do you know your neighbors?. Solutions. 1. Describe . the focus of comparative . planetology. and discuss its importance to solar system studies. .. Comparative . planetology. is . the approach we use to study and understand our solar system. Session 4 – The Nebular Theory. In the past few sessions we looked at the Big Bang theory and how it tries to explain the universe as a whole. Today we will look on a smaller scale of our solar system, and how the Big Bang theory explains (or doesn’t explain) the formation of the solar system. Nebula . Theory. Summing Up. SNT Explaining the Solar System. The Solar System’s disk shape. Inherited from the motion of materials in the solar nebula. . The planets and moons mostly rotate and revolve in the same directions because they evolved from the same gas cloud. . 25.5. Any theory about the origin of the solar system must explain. why all of the planets’ orbits lie more or less in a plane . Why all of the planets orbit the sun in the same direction. . It must also explain the differences in size and composition between the terrestrial planets and the gas giants.. Ninth Edition. Neil F. Comins • William J. Kaufmann III. CHAPTER 5. Formation of the Solar System. and Other Planetary Systems. A montage of the planets in our solar system presented in correct relative sizes. The orbits in the background are also drawn to scale.. © 2015 Pearson Education, Inc.. 6.1 A Brief Tour of the Solar System. Our goals for learning:. What does the solar system look like?. © 2015 Pearson Education, Inc.. What does the solar system look like?. The processes by which stars and planets form are active areas of research in modern astrophysics. The formation of our own solar system is central to the first half of our course, and important to the second half as well when we study the formation of stars. The bodies we see in the sky from earth are called heavenly bodies or celestial bodies. They include the stars, planets, comets and the moons.. Stars. : Stars are huge balls of very hot gaseous matter. They are self-luminous celestial bodies that emit heat and light. The sun is the star nearest to the Earth..