An Explosion of Infrared Color

This colorful nebula is the supernova remnant IC 443. Just like humans stars have life spans as well. When stars die, depends on their mass. Stars with masses close to the suns mass planetary nebulae at the end of their lives. But stars with masses more then the suns become supernovas. This star became a supernova 5000 to 10000 years ago. The reason why it was colorful is because the super nova sent out shock waves which heated up dust and gas in the interstellar medium.

URL:http://www.nasa.gov/mission_pages/WISE/multimedia/gallery/pia13449.html

NASA Scientists Theorize Final Growth Spurt For Planets

New ideas come up for the final gains of mass for the planets. Scientist have unveiled a new theory that the planets gain the final portion of their mass from meteor or astroid impacts after 4.5 billion years ago.

This has to do with physics cause the adding wight mass would have to do with the force the sun uses to keep the planets in orbit. URL:http://www.nasa.gov/home/hqnews/2010/dec/HQ-10-329_Final_Planet_Growth.html