Science (Astronomy): Is it possible to stop an asteroid?

Bill Nye the Science Guy describes how scientists and physicists might be able to stop an asteroid as it comes closer to Earth.  He discusses the possibilities and potential methods of "shifting" an asteroids course.  One thing I liked in the science video is that he discusses some math and units of conversion dealing with weight.  He explains the science and possibilities in a manner that is very easy to understand.  This video might help you as a science teacher visually introduce asteroids to your students.

Subject:  Science (Astronomy)
Grade Level:  4-12
Time:  7:08

Science: What about Mars?

In this educational video, scientists from Arizona State University, discuss a little bit about the red planet, what we know about it, and how we go about studying it.  Great introductory video for those studying Mars.

Subject:  Astronomy
Grade Level:  5-12
Length:  4:49