People have generally assumed that once a star forms inside a galactic disk, it stays in a more or less fixed orbit around the center of its galaxy, but the reality might be much more complicated, according to a study released September 2008.

Image courtesy Rok Roškar

EMAIL NEWSLETTER Photos and News of the Week Get the top photos and news of the week from National Geographic News, plus occasional breaking-news alerts. See Sample >> Please enter a valid email address Thank You! Subscription accepted. An email confirmation will be sent. Privacy Policy MOST VIEWED NEWS PHOTOS: Fake Limbs, More Help Animals Heal PICTURE: "Peculiar" New Geyser Erupts in Russia Humans Can Learn to "See" With Sound, Study Says NEWS FEEDS      Get our news delivered directly to your desktop—free. How to Use XML or RSS