1. By: Paige Hill, Maddy Bewick, and Aviana Catarisano

2. Protoplanetary Disk  A protoplanetary disk is a rotating circumstellar disk of dense gas surrounding a young newly formed star (“Protoplanetary Disk”)  Circumstellar Disk- revolving around or surrounding a star.

3. Video  http://www.space.com/16132-formation- planets-protoplanetary-disk.htm http://www.space.com/16132-formation- planets-protoplanetary-disk.htm  This shows a newly formed star surrounded by a swirling protoplanetary disk of dust and gas (Formation of Planets in Protoplanetary Disk).

4. How it is formed  Protoplanetary disks are formed by surrounding components of close binary systems with respect to temperature and size (“Binary System (astronomy)”).  Binary System – a star system consisting of two stars orbiting around their common center of mass. It consists of brown dwarfs, planets, galaxies and asteroids

5. Pictures  This protoplanetary disk is the seed material from which planets then form

6. Works Cited  "Binary system (astronomy)." Wikipedia. 29 Mar. 2013. Wikimedia Foundation. 12 Apr. 2013 <http://en.wikipedia.org  Formation of Planets in a Protoplanetary Disk | Video | Space.com." Space.com. N.p., n.d. Web. 11 Apr. 2013  "Protoplanetary Disk." Wikipedia. Wikimedia Foundation, 04 Sept. 2013. Web. 11 Apr. 2013.