PARALLAX By: Sophia, Kieli,

and Athena What is a Parallax Discovery! Application Recap Formula Citations A parallax is the apparent change in position of something based

on a different line of sight. Ways that parallax is used in the real world:

1. Naval defense-many naval military weapons have parallax

based shooting mechanisms.

2. Defense-many guns use parallax just like naval defense.

3. New discoveries- can find orbit length with a variation of the formula.

4. Distance-find the distance from our different orbit

positions to stars or far away objects. Parallax is a visual phenomenon. It is used to find the

distance to far away objects. It is also an angle at the far

side of a right triangle. Mattson, Barbara. "Deriving the Parallax Formula." Nasa. Ed. Phil Newman. Nasa, 1997. Web. 15 Jan. 2013.

Turner, Howard. "Parallax." World Book Student. World Book, 2013. Web. 15 Jan. 2013.

Loucks, Eric, prod. What is a parallax?. Narr. Eric Loucks. youtube, 2012. Web. 16 Jan. 2013. <http://www.youtube.com/watch?v=53rqXj5CLFs>.

Palma, Christopher. Diagram of the Parallax of a Nearby Star. 2011. PennState, PennState. Web. 16 Jan. 2013

Academy, Kahn, prod. Parallax in Observing Stars. Perf. Kahn Academy. 2010. youtube, 2012. Web. 17 Jan. 2013. Therefore, parallax is a visual phenomenon. It is used to find the

distance to far away objects. It is also an angle at the far

side of a right triangle. A good example is when you are riding in the car and you are looking out the window and things that are nearby look like they are moving faster than objects that are farther away. Friedrich Wilhelm Bessel created the stellar parallax formula in 1838. The idea that Earth goes around the Sun, rather than the other way around, was proposed in 1543 by Nicholas Copernicus but was not confirmed for 300 years. While other astronomers were working on the problem, the honor of being the first to publish an accurate distance to a star is credited to Friedrich Wilhelm Bessel Director of Königsberg Observatory in Prussia, (now Kaliningrad, Russia) who worked on the problem for 28 years, using the finest telescopes then available. He discovered this by looking at the sky and noticing that the stars in the sky "jump" when he moved positions. So, Friedrich looked into this and created his mathematical formula. Period 1 OR

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# PARALLAX

By:Sophia, Kieli, and Athena