There isn't a science section so I wasn't quite sure where to put this. I figured since I read it in the news this would best fit it. Our Earth emits a sound. I haven't heard it but scientists say that it sounds like chirps and whistles and is AWFUL. This sound is made by charged particles from the solar wind colliding with our magnetic field. The reason we can't hear it is because the ionosphere blocks it. This is called Auroral Kilometric Radiation.
http://news.yahoo.com/s/space/20080701/sc_space/earthscriesrecordedinspace
I don't know if this is important but I found it interesting. Space scares me but fascinates me at the same time. I guess the reason I'm scared of space is because it's a fear of the unknown. As far as we know space is infinite. Scary thought to me.