Browse Media Learn More

Free Membership - Access to more than just media

Families and school personnel (including those in training) who have at least one student with a disability can sign up for free membership.

Accessible Media

Standards-aligned videos with high-quality captions and audio description.

Teaching Tools

Create lessons and assign videos to managed Student Accounts.

Training Videos

Educator and sign language training videos for school personnel and families.
Learning Center

Find resources for providing equal access in the classroom, making media accessible, and maximizing your use of DCMP's free services.
Visit Learning Center

Accessibility Information

DCMP's Learning Center provides hundreds of articles on topics such as remote learning, transition, blindness, ASL, topic playlists, and topics for parents.

See All

Accessibility Guidelines

DCMP offers the only guidelines developed for captioning and describing educational media, used worldwide.
Captioning Key
Description Key

Help Center

Learn how to apply for membership, find and view accessible media, and use DCMP’s teaching tools.
Help Center
Continuing Education and Professional Development

DCMP offers several online courses, including many that offer RID and ACVREP credit. Courses for students are also available.
See All eLearning Resources

QuickClasses

Asynchronous, online classes for professionals working with students who are deaf, hard of hearing, blind, low vision, or deaf-blind.

See QuickClasses

Workshops

For interpreters, audio describers, parents, and educators working with students who are hard of hearing, low vision, and deaf-blind.
See Workshops

Modules

Modules are self-paced, online trainings designed for professionals, open to eLearners and full members.
See Modules

Students

These self-paced, online learning modules cover the topics of transition, note-taking, and learning about audio description.

See Student Courses
Make your educational content accessible and broadly available.

DCMP can add captions, audio description, and sign language interpretation to your educational videos and E/I programming.
Learn More

Accessibility

Captions are essential for viewers who are deaf and hard of hearing, and audio description makes visual content accessible for the blind and visually impaired.

Distribution

DCMP can ensure that your content is always accessible and always available to children with disabilities through our secure streaming platforms.

Meet our partners

DCMP partners with top creators and distributors of educational content. Take a look
About the Described and Captioned Media Program

The DCMP provides services designed to support and improve the academic achievement of students with disabilities. We partner with top educational and television content creators and distributors to make media accessible and available to these students.
Contact Us
Services

Captioning, audio description, and ASL services

Professional training for school personnel

Distribution of fully accessible streaming media

Projects

Media Center

Television Access

We Describe the World

YouTube Audio Description

Privacy and TOS

Privacy Statement

Terms of Service

Accessibility Policy

Mission and Funding

Read More

Crazy Engineering: Ion Propulsion for the Dawn Mission

3 minutes 30 seconds

Short Preview

Apply for Free Membership

Videos are generally available for preview to non-members as short clips. Limited full-length titles are also available. Log In to view the full length title.

Browse Full-length Non-member Titles

Ion propulsion might sound like science fiction, but engineers at NASA are using it to drive NASA’s "Dawn" spacecraft through the solar system. Learn how ion propulsion works and why it is the reason "Dawn" will be the first spacecraft ever to orbit two solar system bodies beyond Earth. Part of the “Crazy Engineering” series.

Media Details

Runtime: 3 minutes 30 seconds

Topic: Science
Subtopic: Astronomy, Physics, Space Sciences
Grade/Interest Level: 7 - 12
Standards:

Release Year: 2014
Producer/Distributor: NASA Jet Propulsion Lab
Series: Crazy Engineering
Report a Problem

NASA Jet Propulsion Laboratory Website

A hexagonal space craft with three much larger wings equally spaced around the hexagonal base flying in space with the planet Jupiter in the distant background. Caption: Juno's going to Jupiter to learn about how it was formed.

A roughly rectangular space craft with two solar wings approaches a much larger round spacecraft surrounded in petal-like protrusions. Caption: The one in space will be tens of meters.

A rectangular space craft with a large, flat round disc pointed towards the planet earth, visible in the background. Caption: We've launched hundreds into low Earth orbit for years.

A person crouching in front of a vertical panel. A device is adhered to the panel. Caption: Real Time. We have electrostatic grippers,

A cylindrical space craft with two solar wings and two rods capped in spheres protruding from it in relief over the planet Earth and space. Caption: The Hubble Telescope is made of several different instruments.

A roughly cube shaped space craft with a communications dish and two large rectangular solar panels flying through space. Caption: It wouldn't be possible without ion propulsion.

A cube shaped space craft on a tripod of legs and four rotor-like wings on top sitting on the surface of a barren planet. Caption: 5 Survive Mars Environment. "And it has to survive the harsh environment of Mars."

A cylindrical space craft with equipment and antennas protruding from it in relief against a large grayish-brown planet with rings in the background. Caption: We'll shoot between Saturn and its rings.