This cloud of dust is gradually dispersing from the radiation blasts of baby stars in the Eagle Nebula. We should enjoy it while we can. It will only last for another millennium. This image from the Astronomy Picture of the Day site, worth a visit every 24 hours.
Just for the sake of perspective, this stretch of interstellar gas and dust is about sixty trillion miles long. And how far away is it? If this pillar were the Empire State building in Manhattan, our solar system would be about the size of a folded dollar bill in Boston’s Fenway Park. The Earth would fit inside of George Washington’s ear.