Well this explains why it is glowing now - http://www.nasa.gov/vision/universe/...-20071128.html

Here are some other interesting articles I found while browsing -
http://www.nasa.gov/home/hqnews/2007...Encounter.html
http://www.nasa.gov/home/hqnews/2007...Collision.html

What do you think is happening?
And to answer that, our solar system is changing. Day by day..

Look at Earth for example.

What the future holds? Who knows o.o Doesn't look too good though...