Space Science Unit 2 Lesson 2 Worksheet 1. Which of Kepler`s laws

... 15. How can the following sequence be fixed to show the proper formation of our solar system? protostellar disk  nuclear fusion  sun  solar nebula  planetesimals  planets solar nebula  protostellar disk  nuclear fusion  sun  planetesimals  planets 16. What is the law of universal gravitati ...

Chapter 19

... Our solar system may have begun when interstellar gas started to condense as a result of gravity. ...