Science Weblecture for Unit 63
|This Unit's||Homework Page||History Lecture||Science Lecture||Lab||Parents' Notes|
Galaxies can be grouped into classes by their shape and energy output. Classifications in the last four decades have changed as our understanding of observational limitations changed.
Take a look at the chart of the the distance ladder at the DavidDarling Encyclopedia site. Follow links to explain terms like "moving cluster" and "main-sequence fitting" methods.
Read about the the classification of galaxies using Hubble's "tuning fork".
© 2005 - 2019 This course is offered through Scholars Online, a non-profit organization supporting classical Christian education through online courses. Permission to copy course content (lessons and labs) for personal study is granted to students currently or formerly enrolled in the course through Scholars Online. Reproduction for any other purpose, without the express written consent of the author, is prohibited.