In this episode, find out how our solar system formed and how it came to be the busy place it is today.
Comprehension Question:
1. Approximately how many billions of years ago did our solar system form?
Answer Key:
1. 4.6 billion years
For a transcript of this video and a fun downloadable poster, visit spaceplace.nas....
Be sure to check out NASA Space Place for a ton of exciting activities, interesting articles, and cool games at spaceplace.nas....
21 ноя 2013
