Josh and natalie ppt Version 2, other solar systems
By Josh and Natalie
How do we study othersolar systems? For years scientists have studied our own solar system The first extra solar planets were discovered in 1995 Using infrared space telescopes make planets clear to see Planets around other stars are hard to find Astronomers map out solar systems
What do we know about other solarsystems? The sun is only one of 200 billion stars It was the 1990s when astronomers found strong evidence of planets around other stars Stars have a lot to do with solar systems Astronomers have so far found over 500 solar systems, they
What types of planets arewe able to locate? Terrestrial Planets Also known as “rocky planets” Composed primarily of metal, rock, and have very high density Have slow periods of rotation Tend to be small Very few satellites or moons Gas Giants Only extra-solar planets that scientists have been able to discover as of yet Low density-composed almost completely of
More planets that weare able to locate: Gas Giants Continued Huge In the middle, these planets have a “rocky center” ○ Not made of rock ○ Made of heavy molten metal and liquid compounds 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 system right now
Tools that we use forinvestigating:They use Infrared Space Telescopes which make planets clearer and easier to view.
Hot Jupiters Hot jupiters are Jupiter-sized exoplanets Hot jupiters are Jupiter-sized exoplanets that orbit very close to their star. Sometimes they orbit their star the wrong direction One method that is used to find them is called the “wobble method.” Basically, astronomers use the wobble motion induced on a star by it’s planet’s gravity to detect the presence of the huge planet. If the star is really wobbly, the closer and larger the planet is. There are also “warm jupiters” which orbit farther away from their stars There are other hot or warm planets too, like
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