Overview: Colliding Galaxies video

of "Video: Colliding Galaxies"
Video: Colliding Galaxies describes how galaxies change when they collide. The interaction causes changes that are tell-tale evidence of the collision. The video features the sequence of events the galaxies undergo during a collision and the galaxies' final outcomes. These collisions often result in larger galaxies and play a role in galaxy evolution.
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: Colliding 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: Colliding Galaxies can be used as:

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

A reinforcement tool. Following an activity in which students learn how galaxies interact, propose a few questions, such as: "What is gravity's role in galaxy interactions?"; "What are the telltale signs that galaxies have interacted?"; "How did scientists discover that the Milky Way and Andromeda galaxies will collide?"; and "What will happen to the galaxies after the collision?" Have students view the video in its entirety and discuss their 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 Colliding Galaxies can be used as:

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

Clip: Feature video can be used as:

• A source of information Find out about what will happen when the Milky Way and Andromeda galaxies collide.

Clip: Myths vs. realities can be used as:

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

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

• A reference tool Have students identify the similarities and differences between collisions of different sized galaxies.

Clip: Beauty shots can be used as:

• A reference tool Have students identify common features of the galaxy collisions shown in the images. This clip can be used in conjunction with "At-a-glance."

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Overview: Colliding Galaxies video