Upload

Loading icon Loading...

This video is unavailable.

Preserving Dark Skies

Sign in to YouTube

Sign in with your Google Account (YouTube, Google+, Gmail, Orkut, Picasa, or Chrome) to like McDonald Observatory's video.

Sign in to YouTube

Sign in with your Google Account (YouTube, Google+, Gmail, Orkut, Picasa, or Chrome) to dislike McDonald Observatory's video.

Sign in to YouTube

Sign in with your Google Account (YouTube, Google+, Gmail, Orkut, Picasa, or Chrome) to add McDonald Observatory's video to your playlist.

Uploaded on Jun 21, 2010

Learn the causes and effects of light pollution, and discover ways to preserve darks skies. For more information, see:
http://mcdonaldobservatory.org/darkskies

Video by Kevin Mace. Script by Damond Benningfield. Narrated by Marc Wetzel.

Loading icon Loading...

Loading icon Loading...

Loading icon Loading...

The interactive transcript could not be loaded.

Loading icon Loading...

Loading icon Loading...

Ratings have been disabled for this video.
Rating is available when the video has been rented.
This feature is not available right now. Please try again later.

Loading icon Loading...

Loading...
Working...
to add this to Watch Later

Add to