ఉల్క: కూర్పుల మధ్య తేడాలు

* [http://solarsystem.nasa.gov/planets/profile.cfm?Object=Meteors Meteoroids Page] at [http://solarsystem.nasa.gov NASA's Solar System Exploration]

* [http://www.imo.net/fireball International Meteor Organization fireball page]

* [http://www.gsfc.nasa.gov/scienceques2005/20060406.htm A Goddard Space Flight Center Science Question of the Week where the answer mentions that a fireball will cast a shadow.]

* [http://www.omcea.be/article-19,19563,Meteor,showers.html Meteor showers] - view tips