1. By Josh and Natalie

2. How do we study othersolar systems? For years scientists havestudied our own solar system The first extra solar planetswere discovered in 1995 Using infrared space telescopesmake planets clear to see Planets around other stars arehard to find Astronomers map out solarsystems 3. What do we know about other solarsystems? The sun is only one of 200billion stars It was the 1990s whenastronomers found strongevidence of planets aroundother stars Stars have a lot to do withsolar systems Astronomers have so far foundover 500 solar systems, they 4. What types of planets are we ableto locate?Planets Terrestrial Also known as rocky planets Composed primarily of metal, rock, and havevery high density Have slow periods of rotation Tend to be small Very few satellites or moons Gas Giants Only extra-solar planets that scientists havebeen able to discover as of yet Low density-composed almost completely ofgas Life may be able to exist on some of these! Huge In the middle, these planets have a rocky 5. More planets that weare able to locate:Planetoids Group of objects too small to be planets and too large to be asteroids Thousands of these objects are orbiting the edge of our solar 6. Tools that we use forinvestigating: They use Infrared Space Telescopeswhich make planets clearer and easier toview. 7. Hot Jupiters Hot jupiters are Jupiter-sized exoplanets Hot jupiters are Jupiter-sized exoplanetsthat orbit very close to their star. Sometimes they orbit their star thewrong direction One method that is used to find them iscalled the wobble method. Basically,astronomers use the wobble motioninduced on a star by its planets gravityto detect the presence of the huge planet.If the star is really wobbly, the closerand larger the planet is. There are also warm jupiters whichorbit farther away from their stars 8. Thats The Winner (video) 9. Bibliography "A map of all the water in the solarsystem." io9. We come from the future..N.p., n.d. Web. 20 Apr. 2012.. "Scale of Universe - Interactive Scale of theUniverse Tool." Scale of Universe - InteractiveScale of the Universe Tool. N.p., n.d. Web. 20Apr. 2012. http://scaleofuniverse.com/ "Solar Systems." Space Place - NASA.N.p., n.d. Web. 12 Apr. 1920..