Discover the scale and structure of the solar system and why we explore it.
Practice Formation of the Sun and Planets questions
Reviews the formation of the sun and planets and the location of planets in the solar system.
Connect your daily life experiences with specific points in a reading using a Double Entry Diary.
A supernova explosion occurred at a serendipitous time in the birth of our solar system. This gave us the heavy elements; scientists discuss whether it also caused the formation of the sun and planets.
At the time the solar system formed, ices and gases were stable farther out from the sun but not closer in. The line separating these two regions is called the frost line.