Overview: Discovering Galaxies video

of "Video: Discovering Galaxies"
Video: Discovering Galaxies describes how galaxies beyond our Milky Way were discovered. We now know the Milky Way is one of many galaxies, but Edwin Hubble was the first to prove our galaxy is not alone. He did this by making use of a unique kind of star called a "Cepheid variable."
Format(s) available: Video (mp4)
Grades: 8-12, but the material can be adapted for use in other grades at the teacher's discretion
How to use the full video in the classroom

Video: Discovering Galaxies lends itself to a variety of viewing modes. Teachers can meet their students' needs by viewing the video in its entirety or selecting from the individual video clips.

Video: Discovering Galaxies can be used as:

A pre-engagement activity. Have students view the entire video as an introduction to a unit of study featuring galaxies.

A reinforcement tool. Following an activity in which students learn how galaxies were discovered, propose a few questions, such as, "Who discovered that galaxies must lie beyond the boundaries of the Milky Way?" and "How did this discovery happen?" Have students view the video in its entirety and discuss the answers to your questions.

An individual learning activity. After viewing the video in its entirety, students can summarize the information contained in the video.

How to use the video clips in the classroom

Clip: Introduction to Galaxies should be used as:

• A background builder Use the introduction to provide necessary prerequisites for the Feature video.

Clip: Introduction to Galaxies can be used as:

• An engagement tool Involve students in a discussion about what they know and think about galaxies.

Clip: Feature video can be used as:

• A source of information Find out about the discovery of galaxies.

Clip: Myths vs. realities can be used as:

• A diagnostic tool Find out whether your students harbor misconceptions about galaxies.

Clip: At-a-glance can be used as:

• A reference tool Have students identify the similarities and differences between the types of galaxies shown in the graphic organizer.

• A model Show students how to analyze the contents and display summary information in a graphic organizer.

• An organization tool The graphic organizer can be used as a tool to help students formulate and arrange their thoughts prior to composing essays about galaxies. In this specific case, have students take notes using the student version of the "Comparison of spiral, elliptical, and irregular galaxies," which can be found here. Students can compose an essay identifying similarities and differences between the three types of galaxies.

Clip: Beauty shots can be used as:

• A reference tool Have students identify common features of the three types of galaxies that are being shown. This can be used in conjunction with "At-a-glance."

Related materials

Online exploration: Hubble Deep Field Academy

Online exploration: Galaxies Galore, Games and More

Graphic Organizer: Comparison of spiral, elliptical, and irregular galaxies

Myths vs. realities: Galaxies

Amazing Space: Galaxy Trading Cards

Overview: Discovering Galaxies video