Visit http://science.nasa.gov/ for more. The ESA/NASA Solar and Heliospheric Observatory has discovered more than 3000 doomed comets that have passed close to the sun. Sungrazer Project: http://sungrazer.nrl.navy.mil+ More details
What are Tags?
Tags are keywords that describe videos. For example, a video of your Hawaiian vacation might be tagged with "Hawaii," "beach," "surfing," and "sunburn."