3-D Coordinate System to Map Galaxies: The Next Dimension
How do we describe a location in space?Copyright NASA/JPL-Caltech, source: http://www.nasa.gov/mission_pages/galex/pia15416.html#.U-LTlPldW6M (The Andromeda Galaxy)
Sudents learn about the three-dimensional Cartesian coordinate system. They also gain perspective on the size of our galaxy (the Milky Way) and the distance of a nearby spiral galaxy, the Andromeda galaxy (shown on the left), using a 3D model. 3D graphing is an important tool used by structural engineers to describe locations in space to fellow engineers. A student worksheet with answer key is provided.
Engineers use a coordinate system whenever they create engineering drawings of objects and structures. This lesson introduces the commonly used Cartesian coordinate system using A Place in Space activity.
At the end of the lesson, students shoud:
- Be able to find a point in space given the X, Y and Z coordinates.
- Have a sense for the dimensions of the Milky Way galaxy, where the Sun is in within it, and the distance to a nearby galaxy.
- Be able to give the X, Y and Z coordinates, given a point in space relative to a specified coordinate system and origin.